Não informado. (1990). Highway research abstracts. National Research Council, Transportation Research Board.
Cita Chicago Style (17a ed.)Não informado. Highway Research Abstracts. Washington: National Research Council, Transportation Research Board, 1990.
Cita MLA (8a ed.)Não informado. Highway Research Abstracts. National Research Council, Transportation Research Board, 1990.
Precaución: Estas citas no son 100% exactas.