ORNSTEIN, M. (2013). A companion to survey research. Sage.
Chicago-čujuhus (17. p.)ORNSTEIN, Michael. A Companion to Survey Research. Sage, 2013.
MLA-čujuhus (9. p.)ORNSTEIN, Michael. A Companion to Survey Research. Sage, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.