Berg, B. L. (2001). Qualitative research methods for the social sciences (4th ed.). Allyn and Bacon.
Dyfyniad Arddull ChicagoBerg, Bruce L. Qualitative Research Methods for the Social Sciences. 4th ed. Boston: Allyn and Bacon, 2001.
Dyfyniad MLABerg, Bruce L. Qualitative Research Methods for the Social Sciences. 4th ed. Allyn and Bacon, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.