Ruaya, J. (2011). Water sports: Tourism's most profitable niche. Philippines Free Press.
Chicago-viite (17. p.)Ruaya, Jun. "Water Sports: Tourism's Most Profitable Niche." Philippines Free Press 2011.
MLA-viite (9. p.)Ruaya, Jun. "Water Sports: Tourism's Most Profitable Niche." Philippines Free Press, 2011.
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