APA (7th ed.) Citation
American Association of Zoological Parks and Aquariums (AAZPA), IUCN. Species Survival Commission, The People's Trust for Endangered Species, WWF, & IUCN. (1991). Tortoises and freshwater turtles: An action plan for their conservation (2nd ed.). IUCN.
Chicago Style (17th ed.) Citation
American Association of Zoological Parks and Aquariums (AAZPA), IUCN. Species Survival Commission, The People's Trust for Endangered Species, WWF, and IUCN. Tortoises and Freshwater Turtles: An Action Plan for Their Conservation. 2nd ed. IUCN, 1991.
MLA (9th ed.) Citation
American Association of Zoological Parks and Aquariums (AAZPA), et al. Tortoises and Freshwater Turtles: An Action Plan for Their Conservation. 2nd ed. IUCN, 1991.
Warning: These citations may not always be 100% accurate.