United States Government Printing Office, Style Board. (1968). Word Division. Supplement to Government Printing Office Style Manual (7. Aufl.).
Chicago-referens (17:e uppl.)United States Government Printing Office, Style Board. Word Division. Supplement to Government Printing Office Style Manual. 7. Aufl. Washington, 1968.
MLA-referens (8:e uppl.)United States Government Printing Office, Style Board. Word Division. Supplement to Government Printing Office Style Manual. 7. Aufl. 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.