Patton, Michael Quinn
Qualitative evaluation and research methods
Sage, 1990
 Buku Teks SO
The Sage handbook of qualitative research
editors, Norman K. Denzin, Yvonna S. Lincoln
Sage , 2018
 Buku Teks
The Sage handbook of qualitative research
edited by Norman K. Denzin and Yvonna S. Lincoln
Sage , 2011
 Buku Teks SO
Handbook of qualitative research
Norman K. Denzin, Yvonna S. Lincoln, editors
Sage Publications, 1994
 Buku Referensi
The Sage handbook of qualitative research
edited by Norman K. Denzin, Yvonna S. Lincoln
Sage, 2011
 Buku Referensi