Dyfyniad APA

Fonseca, W., Herrera, J., & Allice, F. (2014). National metric challenges facing the Costa Rican goal of achieving carbon - neutrality by 2021.

Dyfyniad Arddull Chicago

Fonseca, William, Jorge Herrera, y Federico Allice. National Metric Challenges Facing the Costa Rican Goal of Achieving Carbon - Neutrality By 2021. 2014.

Dyfyniad MLA

Fonseca, William, Jorge Herrera, y Federico Allice. National Metric Challenges Facing the Costa Rican Goal of Achieving Carbon - Neutrality By 2021. 2014.

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