World Tourism Conference Manila. (1980). First World Tourism Conference held in the Philippines International Convention Center, Manila between Sept. 27 - Oct. 10, 1980. [s.n.].
Chicago-referens (17:e uppl.)World Tourism Conference Manila. First World Tourism Conference Held in the Philippines International Convention Center, Manila Between Sept. 27 - Oct. 10, 1980. Manila: [s.n.], 1980.
MLA-referens (9:e uppl.)World Tourism Conference Manila. First World Tourism Conference Held in the Philippines International Convention Center, Manila Between Sept. 27 - Oct. 10, 1980. [s.n.], 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.