Não informado. (1976). AASHTO Quarterly. American Association of State Highway and Transportation Officials.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. AASHTO Quarterly. Washington: American Association of State Highway and Transportation Officials, 1976.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. AASHTO Quarterly. American Association of State Highway and Transportation Officials, 1976.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.