Dyfyniad APA

Méndez, J. C., & Bertsch, F. (2011). Total content and nutrients availability in two samples of ash eject by the Turrialba Volcano, Costa Rica in January 2010.

Dyfyniad Arddull Chicago

Méndez, Juan Carlos, y Floria Bertsch. Total Content and Nutrients Availability in Two Samples of Ash Eject By the Turrialba Volcano, Costa Rica in January 2010. 2011.

Dyfyniad MLA

Méndez, Juan Carlos, y Floria Bertsch. Total Content and Nutrients Availability in Two Samples of Ash Eject By the Turrialba Volcano, Costa Rica in January 2010. 2011.

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