Dyfyniad APA

Rojas-Rodríguez, F., & Torres-Córdoba, G. (2016). Trees of the Central Valley of Costa Rica: Reproduction Fresno Fraxinus uhdei (Wenz.).

Dyfyniad Arddull Chicago

Rojas-Rodríguez, Freddy, y Gustavo Torres-Córdoba. Trees of the Central Valley of Costa Rica: Reproduction Fresno Fraxinus Uhdei (Wenz.). 2016.

Dyfyniad MLA

Rojas-Rodríguez, Freddy, y Gustavo Torres-Córdoba. Trees of the Central Valley of Costa Rica: Reproduction Fresno Fraxinus Uhdei (Wenz.). 2016.

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