APA (7th ed.) Citation

Malthus, T., & Osborn, F. (1960). On population, three essay. New American Library.

Chicago Style (17th ed.) Citation

Malthus, Thomas, and Frederick Osborn. On Population, Three Essay. New York: New American Library, 1960.

MLA (9th ed.) Citation

Malthus, Thomas, and Frederick Osborn. On Population, Three Essay. New American Library, 1960.