Black, T. R. (1999). Doing quantitative research in the social sciences. SAGE.
Dyfyniad Arddull ChicagoBlack, Thomas R. Doing Quantitative Research in the Social Sciences. London: SAGE, 1999.
Dyfyniad MLABlack, Thomas R. Doing Quantitative Research in the Social Sciences. SAGE, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.