APA aipamena

Callicott, J. B., & Frodeman, R. (2009). Encyclopedia of environmental ethics and philosophy. Macmillan Reference USA/Gale Cengage Learning.

Chicago Style aipamena

Callicott, J. Baird, and Robert Frodeman. Encyclopedia of Environmental Ethics and Philosophy. Farmington Hills, MI: Macmillan Reference USA/Gale Cengage Learning, 2009.

MLA aipamena

Callicott, J. Baird, and Robert Frodeman. Encyclopedia of Environmental Ethics and Philosophy. Macmillan Reference USA/Gale Cengage Learning, 2009.