Babbie, Earl R.
The Practice of social research
Wadsworth, 1991
 Buku Teks SO
Babbie, Earl R.
The Practice of social research
Wadsworth, 1998
 Buku Teks SO
Babbie, Earl R.
The practice of social research
Wadsworth and Cengage Learning, 2013
 Buku Teks SO
Sjoberg, Gideon
A methodology for social research
Harper & Row Publishers, 1968
 Buku Teks SO
Lee, Raymond M.
Unobtrusive methods in social research
Open University Press, 2000
 Buku Teks SO