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