Gaya APA

Creswell, J, W. (2005). Educational Research: Planning, Conducting and Evaluating Quantitative and Qualitative Research (2nd ed.). Amerika: Pearson Merrill Pentice Hall.

Gaya MLA

Creswell, John, W.. "Educational Research: Planning, Conducting and Evaluating Quantitative and Qualitative Research". 2nd ed. Amerika: Pearson Merrill Pentice Hall, 2005. Texts.