Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1960). Oklahoma current farm economics. Oklahoma Agricultural Experiment Station.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Oklahoma Current Farm Economics. Stillwater, Okla: Oklahoma Agricultural Experiment Station, 1960.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Oklahoma Current Farm Economics. Oklahoma Agricultural Experiment Station, 1960.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.