Dyfyniad APA

Segura, M., Castillo, Á., Alvarado, A., & Blanco, F. (2005). Nutrient extraction by Alnus acuminata plantations at the Virilla river watershed, Costa Rica.

Dyfyniad Arddull Chicago

Segura, Manuel, Álvaro Castillo, Alfredo Alvarado, y Fabio Blanco. Nutrient Extraction By Alnus Acuminata Plantations At the Virilla River Watershed, Costa Rica. 2005.

Dyfyniad MLA

Segura, Manuel, Álvaro Castillo, Alfredo Alvarado, y Fabio Blanco. Nutrient Extraction By Alnus Acuminata Plantations At the Virilla River Watershed, Costa Rica. 2005.

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