Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1937). Foreign agriculture. U.S. Department of Agriculture, Foreign Agricultural Service.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Foreign Agriculture. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1937.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Foreign Agriculture. U.S. Department of Agriculture, Foreign Agricultural Service, 1937.

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