Campbell, D. T. (1963). Experimental and quasi-experimental designs for research. Rand McNally College.
Chicago-čujuhus (17. p.)Campbell, Donald T. Experimental and Quasi-experimental Designs for Research. Chicago: Rand McNally College, 1963.
MLA-čujuhus (9. p.)Campbell, Donald T. Experimental and Quasi-experimental Designs for Research. Rand McNally College, 1963.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.