Iowa. State Board of Regents. (1956). Report of the State Board of Regents for the biennial period ending ... State of Iowa.
Chicago-referens (17:e uppl.)Iowa. State Board of Regents. Report of the State Board of Regents for the Biennial Period Ending ... Des Moines: State of Iowa, 1956.
MLA-referens (8:e uppl.)Iowa. State Board of Regents. Report of the State Board of Regents for the Biennial Period Ending ... State of Iowa, 1956.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.