Não informado. (1922). American highways. American Association of Highway Officials.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American Highways. Washington: American Association of Highway Officials, 1922.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American Highways. American Association of Highway Officials, 1922.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.