Harper, C. L. (2004). Environment and society: Human perspectives on environmental issues (Third edition.). Pearson/Prentice Hall.
Chicago-Zitierstil (17. Ausg.)Harper, Charles L. Environment and Society: Human Perspectives on Environmental Issues. Third edition. Upper Saddle River, New Jersey: Pearson/Prentice Hall, 2004.
MLA-Zitierstil (9. Ausg.)Harper, Charles L. Environment and Society: Human Perspectives on Environmental Issues. Third edition. Pearson/Prentice Hall, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.