APA (7th ed.) Citation

International Union for Conservation of Nature and Natural Resources. IUCN & IUCN/SSC Tortoise and Freshwater Turtle Specialist Group‏. (1991). Tortoises and freshwater turtles: An action plan for their conservation (2nd ed.). IUCN. https://doi.org/10.2305/IUCN.CH.1989.SSC-AP.8.en

Chicago Style (17th ed.) Citation

International Union for Conservation of Nature and Natural Resources. IUCN and IUCN/SSC Tortoise and Freshwater Turtle Specialist Group‏. Tortoises and Freshwater Turtles: An Action Plan for Their Conservation. 2nd ed. Gland, Suiza: IUCN, 1991. https://doi.org/10.2305/IUCN.CH.1989.SSC-AP.8.en.

MLA (9th ed.) Citation

International Union for Conservation of Nature and Natural Resources. IUCN and IUCN/SSC Tortoise and Freshwater Turtle Specialist Group‏. Tortoises and Freshwater Turtles: An Action Plan for Their Conservation. 2nd ed. IUCN, 1991. https://doi.org/10.2305/IUCN.CH.1989.SSC-AP.8.en.