Focus groups

MLA

Krueger, Richard A, and Mary Anne Casey. Focus Groups : a Practical Guide for Applied Research. 5th edition. Thousand Oaks, CA: Sage, 2015.

APA

Krueger, R. A, & Casey, M. Anne. (2015). Focus groups : a practical guide for applied research. 5th edition. Thousand Oaks, CA: Sage.

Chicago

Krueger, Richard A., and Mary Anne Casey. Focus Groups: A Practical Guide for Applied Research. 5th edition. Thousand Oaks, CA: Sage, 2015.