Ruaya, J. (2011). Water sports: Tourism's most profitable niche. Philippines Free Press.
Chicagoスタイル(17版)引用形式Ruaya, Jun. "Water Sports: Tourism's Most Profitable Niche." Philippines Free Press 2011.
MLA(9版)引用形式Ruaya, Jun. "Water Sports: Tourism's Most Profitable Niche." Philippines Free Press, 2011.
警告: この引用は必ずしも正確ではありません.