National Cooperative Highway Research Program. National Cooperative Highway Research Program report. Highway Research Board.
Chicago-Zitierstil (17. Ausg.)National Cooperative Highway Research Program. National Cooperative Highway Research Program Report. Washington, DC: Highway Research Board.
MLA-Zitierstil (9. Ausg.)National Cooperative Highway Research Program. National Cooperative Highway Research Program Report. Highway Research Board.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.