Não informado. (2004). Highway research circular. National Research Council, Highway Research Board.
Citação do estilo Chicago (17ª ed.)Não informado. Highway Research Circular. Washington: National Research Council, Highway Research Board, 2004.
Citação MLA (8ª ed.)Não informado. Highway Research Circular. National Research Council, Highway Research Board, 2004.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.