Zink, Robert M.; Kessen, A. E. (1999). “Species Limits in the Fox Sparrow”. Birding. 31: 508–517.
Weckstein, J. D., D. E. Kroodsma, and R. C. Faucett. (2002). Fox Sparrow (Passerella iliaca). The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Laboratory of Ornithology; Retrieved from The Birds of North American Online database
Blacquiere JR. M.Sc. (1980). Some aspects of the breeding biology and vocalizations of the fox sparrow, Passerella iliaca, Merrem, in Newfoundland. Memorial University of Newfoundland (Canada), Canada.
Kessen AE. Ph.D. (2004). Population structure in the fox sparrow: An investigation using microsatellites. University of Minnesota, United States—Minnesota.
Martin DJ. Ph.D. (1976). STRUCTURE OF SONGS AND ORGANIZATION OF SINGING IN FOX SPARROWS BREEDING IN NORTHERN UTAH AND SOUTHERN IDAHO. Utah State University, United States—Utah.
Zink RM. Ph.D. (1983). PATTERNS AND EVOLUTIONARY SIGNIFICANCE OF GEOGRAPHIC VARIATION IN THE SCHISTACEA GROUP OF THE FOX SPARROW (PASSERELLA ILIACA) (OREGON, NEVADA, CALIFORNIA). University of California, Berkeley, United States—California.
Anon. (1968). Fox Sparrow Very Rare Summer Resident 10-11-65 Swamp Sparrow Rare Winter Visitor 9-11-67 10-29-67 Lykins Gulch Colorado USA. Colorado Field Ornithologist. vol 4, pp. 13–14.
Banks RC. (1970). The Fox Sparrow on the West Slope of the Oregon Cascades. Condor. vol 72, no 3. pp. 369–370.
Bell CP. (1997). Leap-frog migration in the fox sparrow:: Minimizing the cost of spring migration. Condor. vol 99, no 2. pp. 470–477.
Blankson ENT & McKernan RL. (1995). Evolutionary and ecological considerations of seven subspecies of the fox sparrow (Passerella iliaca) wintering in California. Strauss, M. vol S, p. Unity in Diversity.
Burns KJ. (1993). Geographic variation in ontogeny of the fox sparrow. Condor. vol 95, no 3. pp. 652–661.
Burns KJ & Hackett SJ. (1993). Nest and nest-site characteristics of a western population of fox sparrow (Passerella iliaca). Southwestern Naturalist. vol 38, no 3. pp. 277–279.
Burns KJ & Zink RM. (1990). Temporal and Geographic Homogeneity of Gene Frequencies in the Fox Sparrow Passerella-Iliaca. Auk. vol 107, no 2. pp. 421–425.
Christie DS. (1968). Summer Occurrence of the Fox Sparrow in New-Brunswick Canada Passerella-Iliaca. Canadian Field Naturalist. vol 82, no 1.
Hubert P & Smith A. (1974). Possible Fox Sparrow Nesting in Minnesota. Loon. vol 46, no 1.
Jewer OD & Threlfall W. (1978). Parasites of the Fox Sparrow Passerella-Iliaca and Northern Waterthrush Seiurus-Noveboracensis in Newfoundland Canada. Proceedings of the Helminthological Society of Washington. vol 45, no 2. pp. 270–272.
Johnson JW & Johnson L. (1972). Fox Sparrow Observations in the Huron Area. South Dakota Bird Notes. vol 24, no 4.
Martin DJ. (1977). Songs of the Fox Sparrow Part 1 Structure of Song and Its Comparison with Song in Other Emberizidae. Condor. vol 79, no 2. pp. 209–221.
Martin DJ. (1979). Songs of the Fox Sparrow Passerella-Iliaca 2. Intra Population and Inter Population Variation. Condor. vol 81, no 2. pp. 173–184.
Martin DJ. (1980). Response by Male Fox Sparrows Passerella-Iliaca to Broadcast of Particular Con Specific Songs. Wilson Bulletin. vol 92, no 1. pp. 21–32.
Martin DJ. (1990). Songs of the Fox Sparrow 3. Ordering of song. Wilson Bulletin. vol 102, no 4. pp. 655–671.
Martin DJ, Naugler CT & Smith PC. (1993). Song similarity in populations of fox sparrows: A rejection of Naugler's and Smith's conclusions—Comment/reply. The Condor. vol 95, no 4. p. 1057.
Naugler CT & Smith PC. (1991). Song Similarity in an Isolated Population of Fox Sparrows Passerella-Iliaca. Condor. vol 93, no 4. pp. 1001–1003.
Peyton LJ. (1971). Geographical Variation of Fox Sparrow Songs in Alaska. Proceedings of the Alaska Science Conference. vol 22, no 39.
Robert MZ & Jason DW. (2003). Recent evolutionary history of the Fox Sparrows (Genus: Passerella). The Auk. vol 120, no 2. p. 522.
Ryan AG. (1974). An Incubation Period and a Nestling Period for the Fox Sparrow. Canadian Field Naturalist. vol 88, no 2. pp. 230–231.
Schmid U. (1979). 2 Rare Guest Birds on North Sea Island of Scharhoern West Germany Fox Sparrow Passerella-Iliaca and Scarlet Grosbeak Carpodacus-Erythrinus. Vogelkundliche Berichte aus Niedersachsen. vol 11, no 2. pp. 45–46.
Threlfall W & Blacquiere JR. (1982). Breeding Biology of the Fox Sparrow Passerella-Iliaca in Newfoundland Canada. Journal of Field Ornithology. vol 53, no 3. pp. 235–239.
Webster JD. (1975). The Fox Sparrow in Southwestern Yukon and Adjacent Areas. Condor. vol 77, no 2. pp. 215–216.
Webster JD. (1983). Passerella-Iliaca-Chilcatensis New-Subspecies a Fox Sparrow from Alaska USA. Proceedings of the Biological Society of Washington. vol 96, no 4. pp. 664–668.
Zink RM. (1983). Evolutionary and Systematic Significance of Temporal Variation in the Fox Sparrow Passerella-Iliaca. Systematic Zoology. vol 32, no 3. pp. 223–238.