Dyfyniad APA

Creswell, J. W. 4. (1994). Research design: Qualitative and quantitative approaches. London : Sage Publications.

Dyfyniad Arddull Chicago

Creswell, John W. 401571. Research Design: Qualitative and Quantitative Approaches. London : Sage Publications, 1994.

Dyfyniad MLA

Creswell, John W. 401571. Research Design: Qualitative and Quantitative Approaches. London : Sage Publications, 1994.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.