APA (7e ed.) Bronvermelding

Não informado. (1963). US Forest Service Research Note NE. U.S. Forest Service.

Chicago (17e ed.) Bronvermelding

Não informado. US Forest Service Research Note NE. Upper Darby, Pa: U.S. Forest Service, 1963.

MLA (8e ed.) Bronvermelding

Não informado. US Forest Service Research Note NE. U.S. Forest Service, 1963.

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