Gaya APA

W., C. (2008). Educational Research : Planning, Conducting, and Evaluating Quantitative and Qualitative Research (ed.3). London: Pearson.

Gaya MLA

W., Creswell,John. "Educational Research : Planning, Conducting, and Evaluating Quantitative and Qualitative Research". ed.3 London: Pearson, 2008. Textbook.