Cita APA

Willis, G. B., & Willis, G. B. (2005). Cognitive interviewing: A tool for improving questionnaire design. Thousand Oaks: SAGE Publications.

Citación estilo Chicago

Willis, Gordon Bruce, y Gordon Bruce Willis. Cognitive Interviewing: A Tool for Improving Questionnaire Design. Thousand Oaks: SAGE Publications, 2005.

Cita MLA

Willis, Gordon Bruce, y Gordon Bruce Willis. Cognitive Interviewing: A Tool for Improving Questionnaire Design. Thousand Oaks: SAGE Publications, 2005.