International Union of Official Travel Organizations & World Tourism Organization. (1975). Aims, activities and fields of competence of national tourists organizations. [IUOTO].
Citazione stile Chigago Style (17a edizione)International Union of Official Travel Organizations e World Tourism Organization. Aims, Activities and Fields of Competence of National Tourists Organizations. Geneva: [IUOTO], 1975.
Citatione MLA (9a ed.)International Union of Official Travel Organizations e World Tourism Organization. Aims, Activities and Fields of Competence of National Tourists Organizations. [IUOTO], 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.