APA (7e ed.) Bronvermelding

Não informado. (1932). American Forests. American Forestry Association.

Chicago (17e ed.) Bronvermelding

Não informado. American Forests. Washington: American Forestry Association, 1932.

MLA (8e ed.) Bronvermelding

Não informado. American Forests. American Forestry Association, 1932.

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