APA Citation

Ehrlich, P. R. (1973). Human ecology: Problems and solutions. San Francisco: W. H. freeman.

Chicago Style Citation

Ehrlich, Paul R. Human Ecology: Problems and Solutions. San Francisco: W. H. freeman, 1973.

MLA Citation

Ehrlich, Paul R. Human Ecology: Problems and Solutions. San Francisco: W. H. freeman, 1973.

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