Regional Seminar on the Role of Tourist Administration with Respect to the Environment and Folklore Libreville, Gabon, & International Union of Official Travel Organizations. (1974). The role of tourist administration with respect to the environment and folklore. IUOTO.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Regional Seminar on the Role of Tourist Administration with Respect to the Environment and Folklore Libreville, Gabon, و International Union of Official Travel Organizations. The Role of Tourist Administration with Respect to the Environment and Folklore. Geneva: IUOTO, 1974.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Regional Seminar on the Role of Tourist Administration with Respect to the Environment and Folklore Libreville, Gabon, و International Union of Official Travel Organizations. The Role of Tourist Administration with Respect to the Environment and Folklore. IUOTO, 1974.