APA (7e ed.) Bronvermelding

Não informado. (1920). Station circular. Oregon Agricultural Experiment Station.

Chicago (17e ed.) Bronvermelding

Não informado. Station Circular. Corvallis, Ore: Oregon Agricultural Experiment Station, 1920.

MLA (8e ed.) Bronvermelding

Não informado. Station Circular. Oregon Agricultural Experiment Station, 1920.

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