APA (7th ed.) Citation

Barbara Ward, R. D. (1973). Who Speaks for Earth? WW Norton.

Chicago Style (17th ed.) Citation

Barbara Ward, Rene Dubos. Who Speaks for Earth? WW Norton, 1973.

MLA (8th ed.) Citation

Barbara Ward, Rene Dubos. Who Speaks for Earth? WW Norton, 1973.

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