Cita APA

Eckholm, E. P. (1978). Disappearing species: The social challenge. Worldwatch Institute.

Citación estilo Chicago

Eckholm, Erik P. Disappearing Species: The Social Challenge. [Washington]: Worldwatch Institute, 1978.

Cita MLA

Eckholm, Erik P. Disappearing Species: The Social Challenge. Worldwatch Institute, 1978.

Warning: These citations may not always be 100% accurate.