APA (7e ed.) Bronvermelding

Não informado. (1927). Current farm economics. Oklahoma Agricultural Experiment Station.

Chicago (17e ed.) Bronvermelding

Não informado. Current Farm Economics. Stillwater, Okla: Oklahoma Agricultural Experiment Station, 1927.

MLA (8e ed.) Bronvermelding

Não informado. Current Farm Economics. Oklahoma Agricultural Experiment Station, 1927.

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