Não informado. (1974). Special report. National Research Council, Transportation Research Board.
Chicago-Zitierstil (17. Ausg.)Não informado. Special Report. Washington: National Research Council, Transportation Research Board, 1974.
MLA-Zitierstil (8. Ausg.)Não informado. Special Report. National Research Council, Transportation Research Board, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.