Dyfyniad APA

Creswell, J. W. (1994). Research design: Qualitative & quantitative approaches. Sage.

Dyfyniad Arddull Chicago

Creswell, John W. Research Design: Qualitative & Quantitative Approaches. Thousand Oaks, California: Sage, 1994.

Dyfyniad MLA

Creswell, John W. Research Design: Qualitative & Quantitative Approaches. Sage, 1994.

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