Não informado. (1922). Educational research bulletin. Ohio State University, Bureau of Educational Research.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Educational Research Bulletin. Columbus, Ohio: Ohio State University, Bureau of Educational Research, 1922.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Educational Research Bulletin. Ohio State University, Bureau of Educational Research, 1922.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.