Frost, Nollaig
Qualitative research methods in psychology : combining core approaches
Open University Press, 2011
 Buku Teks
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 1994
 Buku Teks
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Pearson/​Allyn and Bacon, 2006
 Buku Teks
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Pearson Education, 2014
 Buku Teks
Neuman, William Lawrence, 1950-
Social research methods: qualitative and quantitative approaches
Allyn and Bacon, 2003
 Buku Teks