Peterson, J. A., & Tuxill, J. D. (1998). Losing strands in the web of life: Vertebrate declines and the conservation of biological diversity. Worldwatch Institute.
Čikaški stil citiranja (17. izdanje)Peterson, Jane A., i John D. Tuxill. Losing Strands in the Web of Life: Vertebrate Declines and the Conservation of Biological Diversity. Washington, DC: Worldwatch Institute, 1998.
MLA način citiranja (9. izdanje)Peterson, Jane A., i John D. Tuxill. Losing Strands in the Web of Life: Vertebrate Declines and the Conservation of Biological Diversity. Worldwatch Institute, 1998.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.