Cita APA (7a ed.)

Watson, A. (1998). Sources of Law, Legal Change, and Ambiguity. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

Watson, Alan. Sources of Law, Legal Change, and Ambiguity. Philadelphia: University of Pennsylvania Press, 1998.

Cita MLA (8a ed.)

Watson, Alan. Sources of Law, Legal Change, and Ambiguity. University of Pennsylvania Press, 1998.