APA (7th ed.) Citation

Ruiz, R. C., Candelario, Y. P., & Fernández, C. F. El Hierro UNESCO Geopark: Geological Heritage, Geoconservation and Geoturism. OICC Press.

Chicago Style (17th ed.) Citation

Ruiz, Ramón Casillas, Yurena Pérez Candelario, and Cristina Ferro Fernández. El Hierro UNESCO Geopark: Geological Heritage, Geoconservation and Geoturism. OICC Press.

MLA (9th ed.) Citation

Ruiz, Ramón Casillas, et al. El Hierro UNESCO Geopark: Geological Heritage, Geoconservation and Geoturism. OICC Press.

Warning: These citations may not always be 100% accurate.