Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Krueger, Richard A., i Mary Anne Casey. Focus Groups: A Practical Guide for Applied Research. 5th edition. Thousand Oaks, California: SAGE, 2015.

Cita MLA (9th ed.)

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