APA (7th ed.) Citation

Hughes, P. E., & Varley, M. A. (1980). Reproduction in the pig.

Chicago Style (17th ed.) Citation

Hughes, Paul E., and Mike A. Varley. Reproduction in the Pig. 1980.

MLA (9th ed.) Citation

Hughes, Paul E., and Mike A. Varley. Reproduction in the Pig. 1980.

Warning: These citations may not always be 100% accurate.