Dyfyniad APA

Arozarena-Llopis, I., & Gutiérrez-Echevarría, A. (2016). Undercurrent on the beaches of Costa Rica: A major problem.

Dyfyniad Arddull Chicago

Arozarena-Llopis, Isabel, y Alejandro Gutiérrez-Echevarría. Undercurrent On the Beaches of Costa Rica: A Major Problem. 2016.

Dyfyniad MLA

Arozarena-Llopis, Isabel, y Alejandro Gutiérrez-Echevarría. Undercurrent On the Beaches of Costa Rica: A Major Problem. 2016.

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