Não informado. (1922). American highways. American Association of Highway Officials.
Chicago-viite (17. p.)Não informado. American Highways. Washington: American Association of Highway Officials, 1922.
MLA-viite (8. p.)Não informado. American Highways. American Association of Highway Officials, 1922.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.