Kula, E. (1994). Economics of Natural Resources, the Environment and Policies (2nd. ed.). chapman & hall.
Chicago Style (17. basım) AtıfKula, E. Economics of Natural Resources, the Environment and Policies. 2nd. ed. London: chapman & hall, 1994.
MLA (9th ed.) AtıfKula, E. Economics of Natural Resources, the Environment and Policies. 2nd. ed. chapman & hall, 1994.