Dyfyniad APA

Spongberg, A. L., & Davis, P. (1998). Organochlorinated pesticide contaminants in Golfo Dulce, Costa Rica.

Dyfyniad Arddull Chicago

Spongberg, Alison L., y Penny Davis. Organochlorinated Pesticide Contaminants in Golfo Dulce, Costa Rica. 1998.

Dyfyniad MLA

Spongberg, Alison L., y Penny Davis. Organochlorinated Pesticide Contaminants in Golfo Dulce, Costa Rica. 1998.

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