Cita APA (7th ed.)

Cooper, M. M., & Willis, M. B. (1984). Profitable beef production (4a. ed.). Farming Press.

Cita Chicago (17th ed.)

Cooper, M. McGregor, i M. B. Willis. Profitable Beef Production. 4a. ed. Ipswich: Farming Press, 1984.

Cita MLA (9th ed.)

Cooper, M. McGregor, i M. B. Willis. Profitable Beef Production. 4a. ed. Farming Press, 1984.