APA (7th ed.) Citation

Ehrlich, P. R., & Ehrlich, A. H. (1972). Population, resources, environment: Issues in human ecology. W.H. Freeman.

Chicago Style (17th ed.) Citation

Ehrlich, Paul R., and Anne H.;Ehrlich Ehrlich. Population, Resources, Environment: Issues in Human Ecology. W.H. Freeman, 1972.

MLA (9th ed.) Citation

Ehrlich, Paul R., and Anne H.;Ehrlich Ehrlich. Population, Resources, Environment: Issues in Human Ecology. W.H. Freeman, 1972.

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