APA (7th ed.) Citation

Ensor, G. (1967). An inquiry concerning the population of nations: Containing a refutation of Mr. Malthus's Essay on population. A.M. Kelley.

Chicago Style (17th ed.) Citation

Ensor, George. An Inquiry Concerning the Population of Nations: Containing a Refutation of Mr. Malthus's Essay on Population. New York: A.M. Kelley, 1967.

MLA (9th ed.) Citation

Ensor, George. An Inquiry Concerning the Population of Nations: Containing a Refutation of Mr. Malthus's Essay on Population. A.M. Kelley, 1967.