Cita APA (7a ed.)

Cooper, M. M., & Willis, M. B. (1972). Profitable beef production (3a. ed.). Farming Press.

Cita Chicago Style (17a ed.)

Cooper, M. McGregor, y M. B. Willis. Profitable Beef Production. 3a. ed. Ipswich: Farming Press, 1972.

Cita MLA (9a ed.)

Cooper, M. McGregor, y M. B. Willis. Profitable Beef Production. 3a. ed. Farming Press, 1972.