Gaya APA

Creswell, J. (2008). Educational Research : Planning Conducting and Evaluating Quantitative and Qualitative Research (-). New York: Jersey Pearson Prentice Hall.

Gaya MLA

Creswell, John. "Educational Research : Planning Conducting and Evaluating Quantitative and Qualitative Research". - New York: Jersey Pearson Prentice Hall, 2008. Text.