Não informado. (1969). Highways & Traffic Engineering. IPC Building and Contract Journals.
Chicago-Zitierstil (17. Ausg.)Não informado. Highways & Traffic Engineering. London: IPC Building and Contract Journals, 1969.
MLA-Zitierstil (8. Ausg.)Não informado. Highways & Traffic Engineering. IPC Building and Contract Journals, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.