Dyfyniad APA

Ulloa Carmiol, A., & Goicoechea Carranza, C. (2013). Geotourism potential of underground sites in Costa Rica.

Dyfyniad Arddull Chicago

Ulloa Carmiol, Andrés, y Carlos Goicoechea Carranza. Geotourism Potential of Underground Sites in Costa Rica. 2013.

Dyfyniad MLA

Ulloa Carmiol, Andrés, y Carlos Goicoechea Carranza. Geotourism Potential of Underground Sites in Costa Rica. 2013.

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