Gaya APA

Creswell, J, W. (2008). Educational research: planning, conducting, and evaluating quantitative and qualitative research (3rd. Ed.). New Jersey: Pearson education.

Gaya MLA

Creswell, John, W.. "Educational research: planning, conducting, and evaluating quantitative and qualitative research". 3rd. Ed. New Jersey: Pearson education, 2008. Text.