Meiere, H. (1949). Letter to Arno Heuduck, September 18, 1949. Saint Louis University Libraries Digitization Center.
Chicago-referens (17:e uppl.)Meiere, Hildreth. Letter to Arno Heuduck, September 18, 1949. Saint Louis University Libraries Digitization Center, 1949.
MLA-referens (8:e uppl.)Meiere, Hildreth. Letter to Arno Heuduck, September 18, 1949. Saint Louis University Libraries Digitization Center, 1949.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.