Não informado. Transportation noise bulletin. National Research Council, Highway Research Board.
Chicago-referens (17:e uppl.)Não informado. Transportation Noise Bulletin. Washington: National Research Council, Highway Research Board.
MLA-referens (8:e uppl.)Não informado. Transportation Noise Bulletin. National Research Council, Highway Research Board.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.