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.
芝加哥风格引文International Union of Official Travel Organizations 与 International Bank for Reconstruction and Development. Study of the Prospects for Tourism Development in the Middle East Region. Geneva: IUOTO, 1972.
MLA引文International Union of Official Travel Organizations 与 International Bank for Reconstruction and Development. Study of the Prospects for Tourism Development in the Middle East Region. IUOTO, 1972.
警告：这些引文格式不一定是100％准确.