Krueger, R. A. (1988). Focus groups: A practical guide for applied research. Sage Publications.
芝加哥风格引文Krueger, Richard A. Focus Groups: A Practical Guide for Applied Research. Newbury Park, Calif.: Sage Publications, 1988.
MLA引文Krueger, Richard A. Focus Groups: A Practical Guide for Applied Research. Sage Publications, 1988.
警告：这些引文格式不一定是100％准确.