Cita APA (7th ed.)

Hartwick, J. M., & Olewiler, N. D. (1998). The economics of natural resources use (2a. ed.). Addison-Wesley.

Cita Chicago (17th ed.)

Hartwick, John M., i Nancy D. Olewiler. The Economics of Natural Resources Use. 2a. ed. Reading: Addison-Wesley, 1998.

Cita MLA (9th ed.)

Hartwick, John M., i Nancy D. Olewiler. The Economics of Natural Resources Use. 2a. ed. Addison-Wesley, 1998.