Cita APA (7th ed.)
Kula, E. (1994). Economics of natural resources and the environment (2nd. ed.). Chapman & Hall.
Cita Chicago (17th ed.)
Kula, Erhun. Economics of Natural Resources and the Environment. 2nd. ed. London ; New York: Chapman & Hall, 1994.
Cita MLA (9th ed.)
Kula, Erhun. Economics of Natural Resources and the Environment. 2nd. ed. Chapman & Hall, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.