Gaya APA

Creswell, J, W. (2012). Educational research : planning, conducting and evaluating quantitative and qualitative research (Fourth edition). Boston (Amerika Serikat): Pearson.

Gaya MLA

Creswell, John, W.. "Educational research : planning, conducting and evaluating quantitative and qualitative research". Fourth edition Boston (Amerika Serikat): Pearson, 2012. Text.