APA (7th ed.) Citation

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.) Citation

Willis, Gordon B. Cognitive Interviewing: A Tool for Improving Questionnaire Design / Gordon Willis: A Tool for Improving Questionnaire Design. London: SAGE, 2004.

MLA (9th ed.) Citation

Willis, 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.