Cita APA (7a ed.)

National Wildlife Federation & Canadian Wildlife Federation. (1971). International wildlife. National Wildlife Federation.

Cita Chicago Style (17a ed.)

National Wildlife Federation y Canadian Wildlife Federation. International Wildlife. [Washington, D.C.]: National Wildlife Federation, 1971.

Cita MLA (8a ed.)

National Wildlife Federation y Canadian Wildlife Federation. International Wildlife. National Wildlife Federation, 1971.