APA citiranje

Alvarado, G. E., Brenes, J., & Brenes, J. (2011). The ocurrence of amber and sub-amber (copal) in Costa Rica: The case of San Cristóbal de Savegre.

Citación estilo Chicago

Alvarado, Guillermo E., Jorge Brenes, y José Brenes. The Ocurrence of Amber and Sub-amber (copal) in Costa Rica: The Case of San Cristóbal De Savegre. 2011.

MLA citiranje

Alvarado, Guillermo E., Jorge Brenes, y José Brenes. The Ocurrence of Amber and Sub-amber (copal) in Costa Rica: The Case of San Cristóbal De Savegre. 2011.