APA (7th ed.) Citation

with commentaries by Paul R Ehrlich, J. P. H. (1971). Man and the ecosphere. WH Freeman.

Chicago Style (17th ed.) Citation

with commentaries by Paul R Ehrlich, John P Holdren. Man and the Ecosphere. WH Freeman, 1971.

MLA (8th ed.) Citation

with commentaries by Paul R Ehrlich, John P Holdren. Man and the Ecosphere. WH Freeman, 1971.

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