Focus group

Eitemau Tebyg

• Focus Groups
  gan: David W Stewart, Prem N Shamdasani
• Focus Groups
  gan: David W Stewart, Prem N Shamdasani
• Focus groups : theory and practice /
  gan: Stewart, David W.
• Focus group: Theory and practice
  gan: Stewart, David W
  Cyhoeddwyd: (1990)
• Focus groups: theory and practice
  gan: Stewart, David W Shamdasani, Prem N.