Opie, C. (2004). Doing educational research. Vistaar.
Chicago-čujuhus (17. p.)Opie, Clive. Doing Educational Research. New Delhi: Vistaar, 2004.
MLA-čujuhus (9. p.)Opie, Clive. Doing Educational Research. Vistaar, 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.