Não informado. (1962). Theory into practice. Ohio State University, Bureau of Educational Research and Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Theory into Practice. Columbus, Ohio: Ohio State University, Bureau of Educational Research and Service, 1962.
MLA-Zitierstil (8. Ausg.)Não informado. Theory into Practice. Ohio State University, Bureau of Educational Research and Service, 1962.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.