Banks, Marcus
Visual methods in social research
Sage, 2015
Buku Teks
Forcese, Dennis P.
Social research methods
Prentice-Hall, 1973
Buku Teks
Judd, Charles M.
Research methods in social relations
Methuen, 1991
Buku Teks
Research methods in social relations
Louise H. Kidder
Holt, Rinehart and Winston, 1981
Buku Teks
Lee, Raymond M.
Unobtrusive methods in social research
Open University Press, 2000
Buku Teks SO