APA (7th ed.) Citation

Ridker, R. G. (1972). Population resources, and the environment. Government Printing Office.

Chicago Style (17th ed.) Citation

Ridker, Ronald Gene. Population Resources, and the Environment. Washington, D.C: Government Printing Office, 1972.

MLA (9th ed.) Citation

Ridker, Ronald Gene. Population Resources, and the Environment. Government Printing Office, 1972.