National Research Council (U.S.). Highway Research Board. (1973). An Exploratory view of tourist information systems. The Board.
Chicago-Zitierstil (17. Ausg.)National Research Council (U.S.). Highway Research Board. An Exploratory View of Tourist Information Systems. Washington, D.C: The Board, 1973.
MLA-Zitierstil (9. Ausg.)National Research Council (U.S.). Highway Research Board. An Exploratory View of Tourist Information Systems. The Board, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.