Official Airline Guides, inc, & American Hotel & Motel Association. (1990). OAG business travel planner: The official guide to lodging and travel related services (North American ed.). Official Airline Guides.
Cytowanie według stylu Chicago (wyd. 17)Official Airline Guides, inc, i American Hotel & Motel Association. OAG Business Travel Planner: The Official Guide to Lodging and Travel Related Services. North American ed. Oak Brook, IL: Official Airline Guides, 1990.
Cytowanie według stylu MLA (wyd. 8)Official Airline Guides, inc, i American Hotel & Motel Association. OAG Business Travel Planner: The Official Guide to Lodging and Travel Related Services. North American ed. Official Airline Guides, 1990.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..