Cita APA (7th ed.)

Hartwick, J. M., & Olewiler, N. D. (1986). The economics of natural resource use. Harper & Row.

Cita Chicago (17th ed.)

Hartwick, John M., i Nancy D. Olewiler. The Economics of Natural Resource Use. New York, NY: Harper & Row, 1986.

Cita MLA (9th ed.)

Hartwick, John M., i Nancy D. Olewiler. The Economics of Natural Resource Use. Harper & Row, 1986.