Não informado. Highways Design and Construction. IPC Building and Contract Journals.
Chicago-referens (17:e uppl.)Não informado. Highways Design and Construction. London: IPC Building and Contract Journals.
MLA-referens (8:e uppl.)Não informado. Highways Design and Construction. IPC Building and Contract Journals.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.