APA引文

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

Citación estilo Chicago

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

MLA引文

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

警告：这些引文格式不一定是100％准确.