APA (7e ed.) Bronvermelding

Não informado. (1919). National Parks Magazine. National Parks Association.

Chicago (17e ed.) Bronvermelding

Não informado. National Parks Magazine. Washington: National Parks Association, 1919.

MLA (8e ed.) Bronvermelding

Não informado. National Parks Magazine. National Parks Association, 1919.

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