APA (7th ed.) Citation

Helfrich, H. W. (1970). The environmental crisis: Man's struggle to live with himself. Yale University Press.

Chicago Style (17th ed.) Citation

Helfrich, Harold W. The Environmental Crisis: Man's Struggle to Live with Himself. New Haven: Yale University Press, 1970.

MLA (9th ed.) Citation

Helfrich, Harold W. The Environmental Crisis: Man's Struggle to Live with Himself. Yale University Press, 1970.