APA-referens (7:e uppl.)

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.