Não informado. (1974). Directory. Transportation Research Board, National Research Council.
Citação do estilo Chicago (17ª ed.)Não informado. Directory. Washington: Transportation Research Board, National Research Council, 1974.
Citação MLA (8ª ed.)Não informado. Directory. Transportation Research Board, National Research Council, 1974.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.