Gaya APA

Creswell, J, W. (2014). Educational research : planning, conducting and evaluating quantitative and qualitative research (4th ed). Harlow Essex: Pearson.

Gaya MLA

Creswell, John, W.. "Educational research : planning, conducting and evaluating quantitative and qualitative research". 4th ed Harlow Essex: Pearson, 2014. Text.