International Air Transport Association & Pacific Area Travel Association. (1990). Pacific/Asia tourism & air traffic outlook: Seminar at Pan Pacific Hotel, Singapore February 1990. International Air Transport Association and Pacific Asia Travel Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিInternational Air Transport Association এবং Pacific Area Travel Association. Pacific/Asia Tourism & Air Traffic Outlook: Seminar at Pan Pacific Hotel, Singapore February 1990. [Singapore]: International Air Transport Association and Pacific Asia Travel Association, 1990.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিInternational Air Transport Association এবং Pacific Area Travel Association. Pacific/Asia Tourism & Air Traffic Outlook: Seminar at Pan Pacific Hotel, Singapore February 1990. International Air Transport Association and Pacific Asia Travel Association, 1990.