APA (7e ed.) Bronvermelding

Não informado. (1970). National Parks and Conservation Magazine. National Parks & Conservation Association.

Chicago (17e ed.) Bronvermelding

Não informado. National Parks and Conservation Magazine. Washington: National Parks & Conservation Association, 1970.

MLA (8e ed.) Bronvermelding

Não informado. National Parks and Conservation Magazine. National Parks & Conservation Association, 1970.

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