APA (7th ed.) Citation

Simpson, G. G. (1953). Evolution and geography: An eassy on historical biogeography with special reference to mammals. Oregon State System of Higher Education.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. Evolution and Geography: An Eassy on Historical Biogeography with Special Reference to Mammals. Eugene, Oregon: Oregon State System of Higher Education, 1953.

MLA (9th ed.) Citation

Simpson, George Gaylord. Evolution and Geography: An Eassy on Historical Biogeography with Special Reference to Mammals. Oregon State System of Higher Education, 1953.