Willis, G. B. (2004). Cognitive interviewing: a tool for improving questionnaire design / Gordon Willis: A tool for improving questionnaire design. SAGE.
Chicago Style (17th ed.) CitationWillis, Gordon B. Cognitive Interviewing: A Tool for Improving Questionnaire Design / Gordon Willis: A Tool for Improving Questionnaire Design. London: SAGE, 2004.
MLA (9th ed.) CitationWillis, Gordon B. Cognitive Interviewing: A Tool for Improving Questionnaire Design / Gordon Willis: A Tool for Improving Questionnaire Design. SAGE, 2004.
Warning: These citations may not always be 100% accurate.