Research methods : the concise knowledge base /

Eitemau Tebyg

• Research methods : the concise knowledge base workbook /
  gan: Donnelly, James P.
  Cyhoeddwyd: (2005)
• Research methods /
  gan: Trochim, William M. K.
  Cyhoeddwyd: (2003)
• Social research methods : qualitative and quantitative approaches /
  gan: Neuman, William Lawrence, 1950-
  Cyhoeddwyd: (2006)
• Research methods : a process of inquiry /
  gan: Graziano, Anthony M., 1932-
  Cyhoeddwyd: (1989)
• Social research methods : qualitative and quantitative approaches /
  gan: Neuman, William Lawrence, 1950-
  Cyhoeddwyd: (1991)