Acker, D., & Cunningham, M. (1991). Animal science and industry (4th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Acker, Duane, agus Merle Cunningham. Animal Science and Industry. 4th ed. Englewood Cliffs, N.J: Prentice Hall, 1991.
Lua MLA (9ú heag.)Acker, Duane, agus Merle Cunningham. Animal Science and Industry. 4th ed. Prentice Hall, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.