Dyfyniad APA

Lesser,Jonathan A, & Dodds,Daniel E. (1997). Environmental economics and policy. Addison-Wesley.

Dyfyniad Arddull Chicago

Lesser,Jonathan A, and Dodds,Daniel E. Environmental Economics and Policy. Massachussetts: Addison-Wesley, 1997.

Dyfyniad MLA

Lesser,Jonathan A, and Dodds,Daniel E. Environmental Economics and Policy. Addison-Wesley, 1997.

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