Bernard, R. (2013). Social research methods (2nd.). Sage Publication.
Chicago-čujuhus (17. p.)Bernard, Russell. Social Research Methods. 2nd. London: Sage Publication, 2013.
MLA-čujuhus (9. p.)Bernard, Russell. Social Research Methods. 2nd. Sage Publication, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.