Dyfyniad APA

Official Airline Guides, inc. (1991). OAG desktop flight guide (Worldwide ed.). Official Airline Guides.

Dyfyniad Arddull Chicago

Official Airline Guides, inc. OAG Desktop Flight Guide. Worldwide ed. Oak Brook, Ill.: Official Airline Guides, 1991.

Dyfyniad MLA

Official Airline Guides, inc. OAG Desktop Flight Guide. Worldwide ed. Official Airline Guides, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.