↑Hewitt ,J. (1937) A guide to the vertebrate fauna of the Eastern Cape Province, South Africa, Part II: reptile, amphibians, and freshwater fishes., Grahamstown, vii + 141 pp.
↑ 3.03.1Hewitt,J. (1925) On some new species of Reptiles and Amphibians from South Africa., Rec. Albany Mus. (Grahamstown) 3: 343-370
↑ 4.04.1Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (ed.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 24 Septyembre 2012.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)