Dyfyniad APA

Bravo Chacón, J. (1981). Contamination by waste from the Cañas riverbed.

Dyfyniad Arddull Chicago

Bravo Chacón, Juan. Contamination By Waste From the Cañas Riverbed. 1981.

Dyfyniad MLA

Bravo Chacón, Juan. Contamination By Waste From the Cañas Riverbed. 1981.

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