APA (7th ed.) Citation

Johnson, G. (1976). Profitable pig farming (5a. ed.). Farming Press.

Chicago Style (17th ed.) Citation

Johnson, Geoffrey. Profitable Pig Farming. 5a. ed. Londres: Farming Press, 1976.

MLA (9th ed.) Citation

Johnson, Geoffrey. Profitable Pig Farming. 5a. ed. Farming Press, 1976.