APA (7th ed.) Zitazioa
Foy, D. (2004). First principles: A return to humanity's shared traditions. Algora Pub..
Chicago Style (17th ed.) Zitazioa
Foy, Don. First Principles: A Return to Humanity's Shared Traditions. New York: Algora Pub., 2004.
MLA (9th ed.) Zitazioa
Foy, Don. First Principles: A Return to Humanity's Shared Traditions. Algora Pub., 2004.
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