Stewart, D. W., & Shamdasani, P. N. (1990). Focus groups: Theory and practice. Sage Publications.
芝加哥风格引文Stewart, David W., 与 Prem N. Shamdasani. Focus Groups: Theory and Practice. Newbury Park, Calif.: Sage Publications, 1990.
MLA引文Stewart, David W., 与 Prem N. Shamdasani. Focus Groups: Theory and Practice. Sage Publications, 1990.
警告：这些引文格式不一定是100％准确.