Gaya APA

Creswell, J, W. (2008). Educational Research : Planning, Conducting, and Evaluating Quantitative and Qualitative Research 3'rd Ed. (3). NewJersey: Pearson Education.

Gaya MLA

Creswell, John, W.. "Educational Research : Planning, Conducting, and Evaluating Quantitative and Qualitative Research 3'rd Ed.". 3 NewJersey: Pearson Education, 2008. Text.