Philippines. Department of Tourism. Planning Services. Plans and Programs Division. (1993). Study on regional travel in the Philippines: Household survey on travel patterns of Philippine residents 1993. DOT/AIT.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines. Department of Tourism. Planning Services. Plans and Programs Division. Study on Regional Travel in the Philippines: Household Survey on Travel Patterns of Philippine Residents 1993. [Quezon City]: DOT/AIT, 1993.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines. Department of Tourism. Planning Services. Plans and Programs Division. Study on Regional Travel in the Philippines: Household Survey on Travel Patterns of Philippine Residents 1993. DOT/AIT, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.