Gaya APA

COOPER, P, E, C, M. (2010). Volcano and Geothermal Tourism: Sustainable Geo-Resources for Leisure and Recreation . : Earthscan Publication Ltd.

Gaya MLA

COOPER, Patricia, Erfurt;, COOPER,, Malcolm. "Volcano and Geothermal Tourism: Sustainable Geo-Resources for Leisure and Recreation". : Earthscan Publication Ltd, 2010. Buku.