National Research Council (U.S.). Transportation Research Board. (1999). Entry and competition in the U.S. airline industry: Issues and opportunities. Transportation Research Board, National Research Council.
芝加哥风格引文National Research Council (U.S.). Transportation Research Board. Entry and Competition in the U.S. Airline Industry: Issues and Opportunities. Washington, DC: Transportation Research Board, National Research Council, 1999.
MLA引文National Research Council (U.S.). Transportation Research Board. Entry and Competition in the U.S. Airline Industry: Issues and Opportunities. Transportation Research Board, National Research Council, 1999.
警告：这些引文格式不一定是100％准确.