Peterson, J. A., & Tuxill, J. D. (1998). Losing strands in the web of life: Vertebrate declines and the conservation of biological diversity. Worldwatch Institute.
Cita Chicago (17th ed.)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.
Cita MLA (9th ed.)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.
Atenció: Aquestes cites poden no estar 100% correctes.