Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1958). North Dakota Farm Research. North Dakota Agricultural Experiment Station.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. North Dakota Farm Research. Fargo, ND: North Dakota Agricultural Experiment Station, 1958.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. North Dakota Farm Research. North Dakota Agricultural Experiment Station, 1958.

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