APA (7e ed.) Bronvermelding

Não informado. (1963). US Forest Service Research Paper PNW. U.S. Forest Service.

Chicago (17e ed.) Bronvermelding

Não informado. US Forest Service Research Paper PNW. Portland, Ore: U.S. Forest Service, 1963.

MLA (8e ed.) Bronvermelding

Não informado. US Forest Service Research Paper PNW. U.S. Forest Service, 1963.

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