APA (7th ed.) Citation

Gregory, K. J. (2009). Environmental sciences: A student's companion. SAGE.

Chicago Style (17th ed.) Citation

Gregory, K. J. Environmental Sciences: A Student's Companion. Los Angeles ; London: SAGE, 2009.

MLA (9th ed.) Citation

Gregory, K. J. Environmental Sciences: A Student's Companion. SAGE, 2009.

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