Berry, S., Carvall, M., & Spiller, P. T. (1996). Airline hubs: Costs, markups and the implications of customer heterogeneity. National Bureau of Economic Research.
Chicago Style (17. basım) AtıfBerry, Steven, Michael Carvall, ve Pablo T. Spiller. Airline Hubs: Costs, Markups and the Implications of Customer Heterogeneity. Cambridge: National Bureau of Economic Research, 1996.
MLA (9th ed.) AtıfBerry, Steven, et al. Airline Hubs: Costs, Markups and the Implications of Customer Heterogeneity. National Bureau of Economic Research, 1996.
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