David, B. R., & Paulino, R. R. The Pagsanjan Falls destination life cycle: An evaluation of its tourism industry.
芝加哥风格引文David, Baby Regina, 与 Rosell R. Paulino. The Pagsanjan Falls Destination Life Cycle: An Evaluation of Its Tourism Industry. 1999.
MLA引文David, Baby Regina, 与 Rosell R. Paulino. The Pagsanjan Falls Destination Life Cycle: An Evaluation of Its Tourism Industry.
警告：这些引文格式不一定是100％准确.