Cita APA (7a ed.)

Krueger, R. A., & Casey, M. A. (2015). Focus groups: A practical guide for applied research (5th ed.). SAGE.

Cita Chicago Style (17a ed.)

Krueger, Richard A., y Mary Anne Casey. Focus Groups: A Practical Guide for Applied Research. 5th ed. Los Angeles [etc.]: SAGE, 2015.

Cita MLA (9a ed.)

Krueger, Richard A., y Mary Anne Casey. Focus Groups: A Practical Guide for Applied Research. 5th ed. SAGE, 2015.