Holechek, J. (2003). Natural resources: Ecology, economics, and policy (2nd ed.). Prentice Hall.
Citazione stile Chigago Style (17a edizione)Holechek, Jerry. Natural Resources: Ecology, Economics, and Policy. 2nd ed. Upper Saddle River, N.J: Prentice Hall, 2003.
Citatione MLA (9a ed.)Holechek, Jerry. Natural Resources: Ecology, Economics, and Policy. 2nd ed. Prentice Hall, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.