APA-čujuhus (7. p.)
Selbourne, D. (2000). The principle of duty: An essay on the foundations of the civic order. University of Notre Dame Press.
Chicago-čujuhus (17. p.)
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-čujuhus (9. p.)
Selbourne, David. The Principle of Duty: An Essay on the Foundations of the Civic Order. University of Notre Dame Press, 2000.
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