Não informado. (1976). AASHTO Quarterly. American Association of State Highway and Transportation Officials.
Chicago-Zitierstil (17. Ausg.)Não informado. AASHTO Quarterly. Washington: American Association of State Highway and Transportation Officials, 1976.
MLA-Zitierstil (8. Ausg.)Não informado. AASHTO Quarterly. American Association of State Highway and Transportation Officials, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.