ENCYCLOPEDIA.. & MITZEL, H. E. (1969). Encyclopedia of educational research vol.4.-- Ed. 5. The Free Press.
Chicago-čujuhus (17. p.)ENCYCLOPEDIA.. juo Harold E. MITZEL. Encyclopedia of Educational Research Vol.4.-- Ed. 5. New York: The Free Press, 1969.
MLA-čujuhus (9. p.)ENCYCLOPEDIA.. juo Harold E. MITZEL. Encyclopedia of Educational Research Vol.4.-- Ed. 5. The Free Press, 1969.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.