APA-referens (7:e uppl.)
Selbourne, D. (2000). The principle of duty: An essay on the foundations of the civic order. University of Notre Dame Press.
Chicago-referens (17:e uppl.)
Selbourne, David. The Principle of Duty: An Essay on the Foundations of the Civic Order. Notre Dame, Ind.: University of Notre Dame Press, 2000.
MLA-referens (9:e uppl.)
Selbourne, David. The Principle of Duty: An Essay on the Foundations of the Civic Order. University of Notre Dame Press, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.