MORGAN DAVID L. (1997). FOCUS GROUPS AS QUALITATIVE RESEARCH. SAGE PUBLICATIONS.
芝加哥风格引文MORGAN DAVID L. FOCUS GROUPS AS QUALITATIVE RESEARCH. NEW DELHI: SAGE PUBLICATIONS, 1997.
MLA引文MORGAN DAVID L. FOCUS GROUPS AS QUALITATIVE RESEARCH. SAGE PUBLICATIONS, 1997.
警告：这些引文格式不一定是100％准确.