Encyclopedia of research design

Eitemau Tebyg

• Research design : qualitative, quantitative, and mixed methods approaches /
  gan: Creswell, John W.
  Cyhoeddwyd: (2014)
• Research design : qualitative, quantitative, and mixed methods approaches /
  gan: Creswell, John W.
  Cyhoeddwyd: (2014)
• The Sage encyclopedia of social science research methods
  gan: Bryman, Alan; Editor, et al.
  Cyhoeddwyd: (2004)
• Research design: qualitative, quantitative and mixed methods approaches
  gan: Creswell, John W; Author
  Cyhoeddwyd: (2011)
• Research design