Gaya APA

Creswell, J, W. (2009). Research Design: Qualitative, Quantitative, and MIxed Methods Approazhes (Edisi Ketiga). California: SAGE Publications, Inc..

Gaya MLA

Creswell, John, W. "Research Design: Qualitative, Quantitative, and MIxed Methods Approazhes". Edisi Ketiga California: SAGE Publications, Inc., 2009. Texts.