APA (7th ed.) Citation

Krueger, R. A., & Casey, M. A. (2009). Focus groups: A practical guide for applied research (4. ed.). SAGE.

Chicago Style (17th ed.) Citation

Krueger, Richard A., and Mary Anne Casey. Focus Groups: A Practical Guide for Applied Research. 4. ed. Los Angeles [u.a.]: SAGE, 2009.

MLA (9th ed.) Citation

Krueger, Richard A., and Mary Anne Casey. Focus Groups: A Practical Guide for Applied Research. 4. ed. SAGE, 2009.