Gray David E. (2009). Doing Research in the Real World (2nd.). Sage Pub.
Chicago-čujuhus (17. p.)Gray David E. Doing Research in the Real World. 2nd. London: Sage Pub, 2009.
MLA-čujuhus (9. p.)Gray David E. Doing Research in the Real World. 2nd. Sage Pub, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.