APA (7th ed.) Citation

Butler, E. P. (1966). Pigs is pigs / by Ellis Parker Butler. Dover Publications.

Chicago Style (17th ed.) Citation

Butler, Ellis Parker. Pigs Is Pigs / by Ellis Parker Butler. New York: Dover Publications, 1966.

MLA (9th ed.) Citation

Butler, Ellis Parker. Pigs Is Pigs / by Ellis Parker Butler. Dover Publications, 1966.

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