Dyfyniad APA

Bishop, R. C., & Romano, D. [. (1998). Environmental resource valuation: Applications of the contingent valuation method in Italy. Kluwer Academic.

Dyfyniad Arddull Chicago

Bishop, Richard C.[ed.], and Donato [ed.] Romano. Environmental Resource Valuation: Applications of the Contingent Valuation Method in Italy. Boston: Kluwer Academic, 1998.

Dyfyniad MLA

Bishop, Richard C.[ed.], and Donato [ed.] Romano. Environmental Resource Valuation: Applications of the Contingent Valuation Method in Italy. Kluwer Academic, 1998.

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