Gaya APA

Creswell, J, W. (2012). Educational Research Planning, Conducting, and Evaluating Quantitative and Qualitative Research (FOURTH EDITION). Lincolen: Pearson Education Limited.

Gaya MLA

Creswell, John, W.. "Educational Research Planning, Conducting, and Evaluating Quantitative and Qualitative Research". FOURTH EDITION Lincolen: Pearson Education Limited, 2012. Text.