APA (7e ed.) Bronvermelding
HAY, O. P. (1924). The Pleistocene of the middle region of North America and its vertebrates animals.
Chicago (17e ed.) Bronvermelding
HAY, Oliver Perry. The Pleistocene of the Middle Region of North America and Its Vertebrates Animals. Washington, 1924.
MLA (9e ed.) Bronvermelding
HAY, Oliver Perry. The Pleistocene of the Middle Region of North America and Its Vertebrates Animals. 1924.
Let op: Deze citaties zijn niet altijd 100% accuraat.