Zuluaga, A. L. H. (2013). Effects of green tourism on the occupancy level of the Little Surfmaid Hotel in San Juan, La Union. University of the Philippines, Asia Institute of Tourism.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Zuluaga, Alexandra Louise H. Effects of Green Tourism on the Occupancy Level of the Little Surfmaid Hotel in San Juan, La Union. Quezon City: University of the Philippines, Asia Institute of Tourism, 2013.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Zuluaga, Alexandra Louise H. Effects of Green Tourism on the Occupancy Level of the Little Surfmaid Hotel in San Juan, La Union. University of the Philippines, Asia Institute of Tourism, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.