National Conference on Critical Issues for the Future of Intercity Passenger Rail Washington, D.C., & National Research Council (U.S.). Transportation Research Board. (1998). National conference on critical issues for the future of intercity passenger rail. Transportation Research Board, National Research Council.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Conference on Critical Issues for the Future of Intercity Passenger Rail Washington, D.C., και National Research Council (U.S.). Transportation Research Board. National Conference on Critical Issues for the Future of Intercity Passenger Rail. Washington, D.C: Transportation Research Board, National Research Council, 1998.
Παραπομπή σε μορφή MLA (9th εκδ.)National Conference on Critical Issues for the Future of Intercity Passenger Rail Washington, D.C., και National Research Council (U.S.). Transportation Research Board. National Conference on Critical Issues for the Future of Intercity Passenger Rail. Transportation Research Board, National Research Council, 1998.