Frankfort, H., & Groenewegen-Frankfort, H. A. (1951). Before philosophy: The intellectual adventure of ancient man; an essay on speculative thought in the ancient Near East. Penguin Books.
Čikaški stil citiranja (17. izdanje)Frankfort, Henri, i H. A. Groenewegen-Frankfort. Before Philosophy: The Intellectual Adventure of Ancient Man; an Essay on Speculative Thought in the Ancient Near East. Harmondsworth, Middlesex, England: Penguin Books, 1951.
MLA način citiranja (9. izdanje)Frankfort, Henri, i H. A. Groenewegen-Frankfort. Before Philosophy: The Intellectual Adventure of Ancient Man; an Essay on Speculative Thought in the Ancient Near East. Penguin Books, 1951.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.