Krueger, R. A. (1994). Focus groups: A practical guide for applied research (2nd ed.). Sage Publications.
芝加哥风格引文Krueger, Richard A. Focus Groups: A Practical Guide for Applied Research. 2nd ed. Thousand Oaks, Calif.: Sage Publications, 1994.
MLA引文Krueger, Richard A. Focus Groups: A Practical Guide for Applied Research. 2nd ed. Sage Publications, 1994.
警告：这些引文格式不一定是100％准确.