APA (7th ed.) Citation

Hay, O. P. The Pleistocene of North America and its vertebrated animals from the states east of the Mississippi River and from the Canadian provinces east of longitude 95°.

Chicago Style (17th ed.) Citation

Hay, Oliver Perry. The Pleistocene of North America and Its Vertebrated Animals from the States East of the Mississippi River and from the Canadian Provinces East of Longitude 95°.

MLA (9th ed.) Citation

Hay, Oliver Perry. The Pleistocene of North America and Its Vertebrated Animals from the States East of the Mississippi River and from the Canadian Provinces East of Longitude 95°.

Warning: These citations may not always be 100% accurate.