University of Illinois (Urbana-Champaign campus). Bureau of Educational Research, National Association of Directors of Educational Research (U.S.), & American Educational Research Association. (1920). The Journal of educational research. Published for the University of Illinois, Bureau of Educational Research by the Public School Publ. Co..
Παραπομπή σε μορφή Chicago (17η εκδ.)University of Illinois (Urbana-Champaign campus). Bureau of Educational Research, National Association of Directors of Educational Research (U.S.), και American Educational Research Association. The Journal of Educational Research. Bloomington, Ill.: Published for the University of Illinois, Bureau of Educational Research by the Public School Publ. Co., 1920.
Παραπομπή σε μορφή MLA (9th εκδ.)University of Illinois (Urbana-Champaign campus). Bureau of Educational Research, et al. The Journal of Educational Research. Published for the University of Illinois, Bureau of Educational Research by the Public School Publ. Co., 1920.