Saris, . W. E., & Gallhofer, I. N. (2007). Design, Evaluation, and analysis of questionnaires for survey research. Wiley & Sons.
استشهاد بنمط شيكاغوSaris, Willem E., و Irmtraud N. Gallhofer. Design, Evaluation, and Analysis of Questionnaires for Survey Research. Wiley & Sons, 2007.
MLA استشهادSaris, Willem E., و Irmtraud N. Gallhofer. Design, Evaluation, and Analysis of Questionnaires for Survey Research. Wiley & Sons, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.