APA (7th ed.) Citation

Willis, G. B. (2005). Cognitive interviewing: A tool for improving questionnaire design. Sage Publications.

Chicago Style (17th ed.) Citation

Willis, Gordon B. Cognitive Interviewing: A Tool for Improving Questionnaire Design. Thousand Oaks, Calif.: Sage Publications, 2005.

MLA (9th ed.) Citation

Willis, Gordon B. Cognitive Interviewing: A Tool for Improving Questionnaire Design. Sage Publications, 2005.