International Conference on Senior Tourism Recife/Olinda, Brazil, & World Tourism Organization. (1997). Second International Conference on Senior Tourism: Recife/Olinda, State of Pernambuco, Brazil, 12-15 September 1996 : proceedings - selected materials. World Tourism Organization.
Chicago-Zitierstil (17. Ausg.)International Conference on Senior Tourism Recife/Olinda, Brazil, und World Tourism Organization. Second International Conference on Senior Tourism: Recife/Olinda, State of Pernambuco, Brazil, 12-15 September 1996 : Proceedings - Selected Materials. Madrid: World Tourism Organization, 1997.
MLA-Zitierstil (8. Ausg.)International Conference on Senior Tourism Recife/Olinda, Brazil, und World Tourism Organization. Second International Conference on Senior Tourism: Recife/Olinda, State of Pernambuco, Brazil, 12-15 September 1996 : Proceedings - Selected Materials. World Tourism Organization, 1997.