Peterson, J. A., & Tuxill, J. D. (1998). Losing strands in the web of life: Vertebrate declines and the conservation of biological diversity. Worldwatch Institute.
Lua i Stíl Chicago (17ú heag.)Peterson, Jane A., agus John D. Tuxill. Losing Strands in the Web of Life: Vertebrate Declines and the Conservation of Biological Diversity. Washington, DC: Worldwatch Institute, 1998.
Lua MLA (9ú heag.)Peterson, Jane A., agus John D. Tuxill. Losing Strands in the Web of Life: Vertebrate Declines and the Conservation of Biological Diversity. Worldwatch Institute, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.