Black, T. R. (1993). Evaluating social science research: An introduction. Sape.
Chicago-čujuhus (17. p.)Black, Thomas R. Evaluating Social Science Research: An Introduction. London: Sape, 1993.
MLA-čujuhus (9. p.)Black, Thomas R. Evaluating Social Science Research: An Introduction. Sape, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.