Παραπομπή σε μορφή APA (7η εκδ.)

Cunningham, E. P., & Syrstad, O. (1987). Crossbreeding bos indicus and bos taurus for milk production in the tropics. Food and Agriculture Organization of the United Nations.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cunningham, E. P., και O. Syrstad. Crossbreeding Bos Indicus and Bos Taurus for Milk Production in the Tropics. Rome: Food and Agriculture Organization of the United Nations, 1987.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cunningham, E. P., και O. Syrstad. Crossbreeding Bos Indicus and Bos Taurus for Milk Production in the Tropics. Food and Agriculture Organization of the United Nations, 1987.