Tuxill, J. D., & Peterson, J. A. (1998). Losing strands in the web of life: Vertebrate declines and the conservation of biological diversity. Worldwatch Institute.
Čikaški stil citiranja (17. izdanje)Tuxill, John D., i Jane A. Peterson. Losing Strands in the Web of Life: Vertebrate Declines and the Conservation of Biological Diversity. Washington, DC: Worldwatch Institute, 1998.
MLA način citiranja (8. izdanje)Tuxill, John D., i Jane A. Peterson. 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.