Acker, D., & Cunningham, M. (1991). Animal science and industry (4th ed.). Prentice Hall.
Chicago Style aipamenaAcker, Duane, and Merle Cunningham. Animal Science and Industry. 4th ed. Englewood Cliffs, N.J: Prentice Hall, 1991.
MLA aipamenaAcker, Duane, and Merle Cunningham. Animal Science and Industry. 4th ed. Prentice Hall, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.