Holechek, J. (2003). Natural resources: Ecology, economics, and policy (2nd ed.). Prentice Hall.
Cita Chicago (17th ed.)Holechek, Jerry. Natural Resources: Ecology, Economics, and Policy. 2nd ed. Upper Saddle River, N.J: Prentice Hall, 2003.
Cita MLA (9th ed.)Holechek, Jerry. Natural Resources: Ecology, Economics, and Policy. 2nd ed. Prentice Hall, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.