with commentaries by Paul R Ehrlich, J. P. H. (1971). Man and the ecosphere. WH Freeman.
Chicago Style (17th ed.) Citationwith commentaries by Paul R Ehrlich, John P Holdren. Man and the Ecosphere. WH Freeman, 1971.
MLA (8th ed.) Citationwith commentaries by Paul R Ehrlich, John P Holdren. Man and the Ecosphere. WH Freeman, 1971.
Warning: These citations may not always be 100% accurate.