Leys, W. A. R. (1952). Ethics for policy decisions: The art of asking deliberative questions. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Leys, Wayne A. R. Ethics for Policy Decisions: The Art of Asking Deliberative Questions. New York: Prentice-Hall, 1952.
Lua MLA (9ú heag.)Leys, Wayne A. R. Ethics for Policy Decisions: The Art of Asking Deliberative Questions. Prentice-Hall, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.