Gaya APA

Robertson, D. et al (2006). EBOOK : TOURISM RISK MANAGEMENT - An Authoritative Guide to Managing Crises an Tourism . Singapore: Asia-Pacific Economic Cooperation.

Gaya MLA

Robertson, Doone. et al. "EBOOK : TOURISM RISK MANAGEMENT - An Authoritative Guide to Managing Crises an Tourism". Singapore: Asia-Pacific Economic Cooperation, 2006. Text.