APA (7th ed.) Citation

Paul R Ehrlich, A. H. E. (1970). Population resources environment: Issues in human ecology. WH Freeman.

Chicago Style (17th ed.) Citation

Paul R Ehrlich, Anne H Ehrlich. Population Resources Environment: Issues in Human Ecology. WH Freeman, 1970.

MLA (8th ed.) Citation

Paul R Ehrlich, Anne H Ehrlich. Population Resources Environment: Issues in Human Ecology. WH Freeman, 1970.

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