National Safety Council. (1957). Traffic safety: A National Safety Council publication. National Safety Council.
Chicago-Zitierstil (17. Ausg.)National Safety Council. Traffic Safety: A National Safety Council Publication. Itasca, Ill: National Safety Council, 1957.
MLA-Zitierstil (9. Ausg.)National Safety Council. Traffic Safety: A National Safety Council Publication. National Safety Council, 1957.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.