Lange, Jeffrey K. “Review: Richard A. Krueger & Mary Anne Casey (2000). Focus Groups. A Practical Guide for Applied Research (3rd Edition)”. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research 3, no. 4 (November 30, 2002). Accessed April 20, 2024. https://www.qualitative-research.net/index.php/fqs/article/view/791.