Cita APA (7a ed.)
Krueger, R. A. Developing Questions for Focus Groups. Sage.
Cita estilo Chicago (17a ed.)
Krueger, Richard A. Developing Questions for Focus Groups. Los Angeles, EUA: Sage.
Cita MLA (9a ed.)
Krueger, Richard A. Developing Questions for Focus Groups. Sage.
警告：這些引文格式不一定是100％准確.