1. Focus Groups as Qualitative Research;Morgan,1997
2. Developing Focus Group Research,1999
3. Focus Groups;Krueger,2000
4. The Focus Group Research Handbook;Edmunds,1999
5. Focus Group Kit (Thousand Oaks, CA: Sage, 1998): David L. Morgan, The Focus Group Guidebook; David L. Morgan, Planning Focus Groups; Richard A. Krueger, Developing Questions for Focus Groups; Richard A. Krueger, Moderating Focus Groups; Richard A. Krueger & Jean A. King, Involving Community Members in Focus Groups; and Richard A. Krueger, Analyzing & Reporting Focus Group Results