International Union of Official Travel Organizations & International Bank for Reconstruction and Development. (1972). Study of the prospects for tourism development in the Middle East Region. IUOTO.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Union of Official Travel Organizations و International Bank for Reconstruction and Development. Study of the Prospects for Tourism Development in the Middle East Region. Geneva: IUOTO, 1972.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)International Union of Official Travel Organizations و International Bank for Reconstruction and Development. Study of the Prospects for Tourism Development in the Middle East Region. IUOTO, 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.