Gaya APA

Tretheway, M, W., Oum, T, H. (1992). Airline Economics: Foundations for Strategy and Policy (1). Vancouver, British Columbia C: Centre for Transportation Studies.

Gaya MLA

Tretheway, Michael, W.., Oum, Tae, H.. "Airline Economics: Foundations for Strategy and Policy". 1 Vancouver, British Columbia C: Centre for Transportation Studies, 1992. Text.