Cansino, A. B. The impacts of problems in managing and promoting cave destinations in assessing the state of spelunking in the Philippines: A case study of Biak-Na-Bato National Park in Bulacan.
Chicago-referens (17:e uppl.)Cansino, Abegale B. The Impacts of Problems in Managing and Promoting Cave Destinations in Assessing the State of Spelunking in the Philippines: A Case Study of Biak-Na-Bato National Park in Bulacan. 2004.
MLA-referens (9:e uppl.)Cansino, Abegale B. The Impacts of Problems in Managing and Promoting Cave Destinations in Assessing the State of Spelunking in the Philippines: A Case Study of Biak-Na-Bato National Park in Bulacan.
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