APA引文

STEWART DAVID. (1990). FOCUS GROUPS. SAGE PUBLICATIONS.

芝加哥风格引文

STEWART DAVID. FOCUS GROUPS. NEWBURY PARK: SAGE PUBLICATIONS, 1990.

MLA引文

STEWART DAVID. FOCUS GROUPS. SAGE PUBLICATIONS, 1990.

警告：这些引文格式不一定是100％准确.