Gaya APA

Creswell, J, W. (2014). E-Book Research Design: Qualitative, Quantitative, and Mixed Methods Approaches (Fourth Edition) (4). California: Sage Publications, Inc..

Gaya MLA

Creswell, John, W.. "E-Book Research Design: Qualitative, Quantitative, and Mixed Methods Approaches (Fourth Edition)". 4 California: Sage Publications, Inc., 2014. E-Book.