Não informado. (1922). Educational research bulletin. Ohio State University, Bureau of Educational Research.
Chicago-referens (17:e uppl.)Não informado. Educational Research Bulletin. Columbus, Ohio: Ohio State University, Bureau of Educational Research, 1922.
MLA-referens (8:e uppl.)Não informado. Educational Research Bulletin. Ohio State University, Bureau of Educational Research, 1922.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.