National Research Council (U.S.). Highway Research Board & Engineering Foundation (U.S.). (1974). Issues in public transportation: Proceedings of a conference. National Research Council,Transportation Research Board.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Research Council (U.S.). Highway Research Board και Engineering Foundation (U.S.). Issues in Public Transportation: Proceedings of a Conference. Washington, D.C: National Research Council,Transportation Research Board, 1974.
Παραπομπή σε μορφή MLA (9th εκδ.)National Research Council (U.S.). Highway Research Board και Engineering Foundation (U.S.). Issues in Public Transportation: Proceedings of a Conference. National Research Council,Transportation Research Board, 1974.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.