Cita APA (7a ed.)

Krueger, R. A., & Patton, M. Q. (1988). Focus groups: A practical guide for applied research. Sage.

Cita Chicago Style (17a ed.)

Krueger, Richard A., y Michael Quinn Patton. Focus Groups: A Practical Guide for Applied Research. Newbury Park [etc.]: Sage, 1988.

Cita MLA (9a ed.)

Krueger, Richard A., y Michael Quinn Patton. Focus Groups: A Practical Guide for Applied Research. Sage, 1988.