Cita APA (7a ed.)

Willmott, L., Christensen, S., & Butler, D. A. (2001). Contract law. Oxford University Press.

Cita Chicago Style (17a ed.)

Willmott, Lindy, Sharon Christensen, y D. A. Butler. Contract Law. Melbourne ; Oxford: Oxford University Press, 2001.

Cita MLA (9a ed.)

Willmott, Lindy, et al. Contract Law. Oxford University Press, 2001.