Não informado. (1960). Oklahoma current farm economics. Oklahoma Agricultural Experiment Station.
Style de citation Chicago (17e éd.)Não informado. Oklahoma Current Farm Economics. Stillwater, Okla: Oklahoma Agricultural Experiment Station, 1960.
Style de citation MLA (8e éd.)Não informado. Oklahoma Current Farm Economics. Oklahoma Agricultural Experiment Station, 1960.
Attention : ces citations peuvent ne pas être correctes à 100%.