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Rhodin, A.G.J.; Walde, A.D.; Horne, B.D.; van Dijk, P.P.; Blanck, T.; Hudson, R. (2011). Turtles in trouble: the world’s 25+ most endangered tortoises and freshwater turtles(PDF). IUCN/SSC Tortoise and Freshwater Turtle Specialist Group, Turtle Conservation Fund, Turtle Survival Alliance, Turtle Conservancy, Chelonian Research Foundation, Conservation International, Wildlife Conservation Society, and San Diego Zoo Global, Lunenburg, Massachusetts, USA. hlm. 54. Diarsipkan dari versi asli(PDF) tanggal 2019-10-29. Diakses tanggal 2022-01-01.