Cita APA (7th ed.)

Acker, D., & Cunningham, M. (1991). Animal science and industry (4th ed.). Prentice Hall.

Cita Chicago (17th ed.)

Acker, Duane, i Merle Cunningham. Animal Science and Industry. 4th ed. Englewood Cliffs, N.J: Prentice Hall, 1991.

Cita MLA (9th ed.)

Acker, Duane, i Merle Cunningham. Animal Science and Industry. 4th ed. Prentice Hall, 1991.