^Norbert Pfennig and Hans G. Truper (01 January 1971). “Higher Taxa of the Phototrophic Bacteria”. International Journal of Systematic and Evolutionary Microbiology21 (1): 17-18. doi:10.1099/00207713-21-1-17.
^ abV. B. D. Skerman, Vicki. McGOWAN and P. H. A. Sneath (01 January 1980). “Approved Lists of Bacterial Names”. International Journal of Systematic and Evolutionary Microbiology30 (1): 225-420. doi:10.1099/00207713-30-1-225.
^ abAnton Hördt Marina García López, Jan P. Meier-Kolthoff, Marcel Schleuning, Lisa-Maria Weinhold, Brian J. Tindall, Sabine Gronow, Nikos C. Kyrpides, Tanja Woyke, Markus Göker (07 April 2020). “Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria”. Frontiers in Microbiology11: 468. doi:10.3389/fmicb.2020.00468.
^Aharon Oren, George Garrity (30 July 2020). “Notification of changes in taxonomic opinion previously published outside the IJSEM”. International Journal of Systematic and Evolutionary Microbiology70 (7): 4061-4090. doi:10.1099/ijsem.0.004245.
^Molisch H (1907). Die Purpurbakterien nach neuen Untersuchungen I-VII. G. Fischer.
^J. P. Euzéby. “Order Rhodospirillales”. List of Prokaryotic Names with Standing in Nomenclature. 2024年6月3日閲覧。
^ abGarrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. ISBN978-0-387-24145-6.