Gaya APA

Creswell, J, W., Creswell, J, D. (2023). Research design : qualitative, quantitative, and mixed methods approaches sixth edition (Edisi enam). Thousand Oaks: Sage Publications, inc..

Gaya MLA

Creswell, John, W.., Creswell, J., David. "Research design : qualitative, quantitative, and mixed methods approaches sixth edition". Edisi enam Thousand Oaks: Sage Publications, inc., 2023. Text.