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 (9a ed.)
National Wildlife Federation y Canadian Wildlife Federation. International Wildlife. National Wildlife Federation, 1971.
Precaución: Estas citas no son 100% exactas.