Não informado. (2004). Highway research circular. National Research Council, Highway Research Board.
Chicago-Zitierstil (17. Ausg.)Não informado. Highway Research Circular. Washington: National Research Council, Highway Research Board, 2004.
MLA-Zitierstil (8. Ausg.)Não informado. Highway Research Circular. National Research Council, Highway Research Board, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.