Neuman, W. L. (1997). Social research methods: Qualitative and quantitative approaches. USA: Allyn and Bacon.
استشهاد بنمط شيكاغوNeuman, William Lawrence. Social Research Methods: Qualitative and Quantitative Approaches. USA: Allyn and Bacon, 1997.
MLA استشهادNeuman, William Lawrence. Social Research Methods: Qualitative and Quantitative Approaches. USA: Allyn and Bacon, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.