Gaya APA

Creswell, J, W. (2012). Educational Research; Palning, conduting and evaluating quantitative and qualitative research (edisi 4). University of braska- lincoln: Pearson.

Gaya MLA

Creswell, Jhon, W.. "Educational Research; Palning, conduting and evaluating quantitative and qualitative research". edisi 4 University of braska- lincoln: Pearson, 2012. >