Dyfyniad APA

Harris, J. M. (2006). Environmental and natural resource economics: A contemporary approach (2nd ed.). Houghton Mifflin.

Dyfyniad Arddull Chicago

Harris, Jonathan M. Environmental and Natural Resource Economics: A Contemporary Approach. 2nd ed. Boston: Houghton Mifflin, 2006.

Dyfyniad MLA

Harris, Jonathan M. Environmental and Natural Resource Economics: A Contemporary Approach. 2nd ed. Houghton Mifflin, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.