Dyfyniad APA

González Ballar, R. (2014). The Payment for Environmental Services in Costa Rica.

Dyfyniad Arddull Chicago

González Ballar, Rafael. The Payment for Environmental Services in Costa Rica. 2014.

Dyfyniad MLA

González Ballar, Rafael. The Payment for Environmental Services in Costa Rica. 2014.

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