Παραπομπή APA

Saris, . W. E., & Gallhofer, I. N. (2007). Design, Evaluation, and analysis of questionnaires for survey research. Wiley & Sons.

Παραπομπή Chicago Style

Saris, Willem E., και Irmtraud N. Gallhofer. Design, Evaluation, and Analysis of Questionnaires for Survey Research. Wiley & Sons, 2007.

Παραπομπή MLA

Saris, Willem E., και Irmtraud N. Gallhofer. Design, Evaluation, and Analysis of Questionnaires for Survey Research. Wiley & Sons, 2007.