APA-referens (7:e uppl.)

Krueger, R. A. (1988). Focus groups: A practical guide for applied research. Sage Publications.

Chicago-referens (17:e uppl.)

Krueger, Richard A. Focus Groups: A Practical Guide for Applied Research. Newbury Park, Calif.: Sage Publications, 1988.

MLA-referens (8:e uppl.)

Krueger, Richard A. Focus Groups: A Practical Guide for Applied Research. Sage Publications, 1988.