Não informado. (1927). California highways and public works. State of California, Department of Public Works.
Chicago-referens (17:e uppl.)Não informado. California Highways and Public Works. Sacramento, Calif: State of California, Department of Public Works, 1927.
MLA-referens (8:e uppl.)Não informado. California Highways and Public Works. State of California, Department of Public Works, 1927.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.