Ehrlich, P. R., Ehrlich, A. H., & Holdren, J. P. (1973). Human ecology : problems and solutions / [by] Paul R. Ehrlich, Anne H. Ehrlich, John P. Holdren: Problems and solutions. W. H. Freeman.
Chicago Style (17th ed.) CitationEhrlich, Paul R., Anne H. Ehrlich, and John P. Holdren. Human Ecology : Problems and Solutions / [by] Paul R. Ehrlich, Anne H. Ehrlich, John P. Holdren: Problems and Solutions. San Francisco: W. H. Freeman, 1973.
MLA (9th ed.) CitationEhrlich, Paul R., et al. Human Ecology : Problems and Solutions / [by] Paul R. Ehrlich, Anne H. Ehrlich, John P. Holdren: Problems and Solutions. W. H. Freeman, 1973.
Warning: These citations may not always be 100% accurate.