Não informado. (1970). Journal of Traffic Safety Education. California Driver Education Association.
Chicago-referens (17:e uppl.)Não informado. Journal of Traffic Safety Education. Long Beach, Calif: California Driver Education Association, 1970.
MLA-referens (8:e uppl.)Não informado. Journal of Traffic Safety Education. California Driver Education Association, 1970.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.