Cita APA (7th ed.)

Tuxill, J. D., & Peterson, J. A. (1998). Losing strands in the web of life: Vertebrate declines and the conservation of biological diversity. Worldwatch Institute.

Cita Chicago (17th ed.)

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.

Cita MLA (8th ed.)

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.