Creswell, J. W. (2009). Research Design. Response Books.
Chicago-čujuhus (17. p.)Creswell, John W. Research Design. New Delhi: Response Books, 2009.
MLA-čujuhus (9. p.)Creswell, John W. Research Design. Response Books, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.