Παραπομπή σε μορφή APA (7η εκδ.)

North Dakota Agricultural College. Agricultural Extension Service. (1935). Circular. Agricultural Extension Service, North Dakota Agricultural College.

Παραπομπή σε μορφή Chicago (17η εκδ.)

North Dakota Agricultural College. Agricultural Extension Service. Circular. Fargo, N.D.: Agricultural Extension Service, North Dakota Agricultural College, 1935.

Παραπομπή σε μορφή MLA (8th εκδ.)

North Dakota Agricultural College. Agricultural Extension Service. Circular. Agricultural Extension Service, North Dakota Agricultural College, 1935.