Gaya APA

Creswell., J, W. (2018). Qualitative inquiry & research design : choosing among five approaches fourth edition (Edisi empat). USA: Sage Publications, inc..

Gaya MLA

Creswell., John, W.. "Qualitative inquiry & research design : choosing among five approaches fourth edition". Edisi empat USA: Sage Publications, inc., 2018. Text.