Torres, K. M. M., & Tuazon, F. S. B. (2012). An exploratory study on the travel motivations, preferences and barriers of the senior citizens in the capital regions. UP Asian Institute of Tourism.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Torres, Katrina Marie M., و Faye Samantha B. Tuazon. An Exploratory Study on the Travel Motivations, Preferences and Barriers of the Senior Citizens in the Capital Regions. Quezon City: UP Asian Institute of Tourism, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Torres, Katrina Marie M., و Faye Samantha B. Tuazon. An Exploratory Study on the Travel Motivations, Preferences and Barriers of the Senior Citizens in the Capital Regions. UP Asian Institute of Tourism, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.