Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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