APA (7e ed.) Bronvermelding

Não informado. (1971). International Wildlife. International Wildlife Federation.

Chicago (17e ed.) Bronvermelding

Não informado. International Wildlife. Washington: International Wildlife Federation, 1971.

MLA (8e ed.) Bronvermelding

Não informado. International Wildlife. International Wildlife Federation, 1971.

Let op: Deze citaties zijn niet altijd 100% accuraat.