International Air Transport Association. (1999). Ticketing handbook (31st ed.). International Air Transport Association.
Chicago Style (17th ed.) CitationInternational Air Transport Association. Ticketing Handbook. 31st ed. Montreal: International Air Transport Association, 1999.
MLA (9th ed.) CitationInternational Air Transport Association. Ticketing Handbook. 31st ed. International Air Transport Association, 1999.
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