May, Tim
Social research: issues, methods and process
Open University Press, 2001
Buku Teks
Judd, Charles M.
Research methods in social relations
Methuen, 1991
Buku Teks
Sjoberg, Gideon
A methodology for social research
Harper & Row Publishers, 1968
Buku Teks
Babbie, Earl
The practice of social research
Cengage Learning, 2016
Buku Teks
Lee, Raymond M.
Unobtrusive methods in social research
Open University Press, 2000
Buku Teks