APA (7th ed.) Citation

Brent, G., Hovell, D., Ridgeon, R. F., & Smith, W. J. (1977). Early weaning of pigs (2a. ed.). Farming Press.

Chicago Style (17th ed.) Citation

Brent, G., D. Hovell, R. F. Ridgeon, and W. J. Smith. Early Weaning of Pigs. 2a. ed. Londres: Farming Press, 1977.

MLA (9th ed.) Citation

Brent, G., et al. Early Weaning of Pigs. 2a. ed. Farming Press, 1977.