International Air Transport Association. (1996). Ticketing handbook (28th ed.). International Air Transport Association.
Citazione stile Chigago Style (17a edizione)International Air Transport Association. Ticketing Handbook. 28th ed. Montreal: International Air Transport Association, 1996.
Citatione MLA (9a ed.)International Air Transport Association. Ticketing Handbook. 28th ed. International Air Transport Association, 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.