Berg, Bruce Lawrence, 1954-
Qualitative research methods for the social sciences
Pearson, 2004
 Buku Teks SO
Berg, Bruce Lawrence, 1954-
Qualitative reseach methods for the social sciences
Allyn and Bacon, 1989
 Buku Teks
Research methods in the social sciences
edited, Bridget Somekh, Cathy Lewin
Sage Publications , 2005
 Buku Teks SO
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 2003
 Buku Teks
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 2000
 Buku Teks