David, B. R., & Paulino, R. R. The Pagsanjan Falls destination life cycle: An evaluation of its tourism industry.
Chicago-viite (17. p.)David, Baby Regina, ja Rosell R. Paulino. The Pagsanjan Falls Destination Life Cycle: An Evaluation of Its Tourism Industry. 1999.
MLA-viite (9. p.)David, Baby Regina, ja Rosell R. Paulino. The Pagsanjan Falls Destination Life Cycle: An Evaluation of Its Tourism Industry.
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