Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

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.

Παραπομπή σε μορφή MLA (9th εκδ.)

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.