APA (7th ed.) Citation

Johnson, G. (1978). Profitable pig farming (5th (revised) ed.). Farming Press.

Chicago Style (17th ed.) Citation

Johnson, Geoffrey. Profitable Pig Farming. 5th (revised) ed. Ipswich: Farming Press, 1978.

MLA (9th ed.) Citation

Johnson, Geoffrey. Profitable Pig Farming. 5th (revised) ed. Farming Press, 1978.