APA (7th ed.) Citation

English, P. R., Smith, W. J., & MacLean, A. (1977). The sow, improving her efficiency. Farming Press.

Chicago Style (17th ed.) Citation

English, Peter R., William J. Smith, and Alistair MacLean. The Sow, Improving Her Efficiency. Ipswich: Farming Press, 1977.

MLA (9th ed.) Citation

English, Peter R., et al. The Sow, Improving Her Efficiency. Farming Press, 1977.