APA (7th ed.) Citation

Brownsword, R., Smith, J. C., & Thomas, J. A. C. (2009). Smith and Thomas: A casebook on contract (12th ed.). Sweet & Maxwell.

Chicago Style (17th ed.) Citation

Brownsword, Roger, J. C. Smith, and J. A. C. Thomas. Smith and Thomas: A Casebook on Contract. 12th ed. London: Sweet & Maxwell, 2009.

MLA (9th ed.) Citation

Brownsword, Roger, et al. Smith and Thomas: A Casebook on Contract. 12th ed. Sweet & Maxwell, 2009.