Creswell, John W.
Qualitative inquiry and research design : choosing among five traditions
Sage, 1998
Buku Teks
Creswell, John W.
Research design : qualitative, quantitative, approaches
Sage, 1994
Buku Teks SO
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 2003
Buku Teks
Punch, Keith F.
Introduction to Social Research: quantitative and qualitative approaches
Sage, 1998
Buku Teks
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 2000
Buku Teks