Creswell, J. W. (2012). Educational Research: Planning, conducting, and evaluating quantitative and qualitative research (4th ed.). Pearson.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 4th ed. Noida: Pearson, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Creswell, John W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research. 4th ed. Pearson, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.