Babbie, Earl R.
The practice of social research
Wadsworth, 2010
Buku Teks SO
Babbie, Earl R.
The practice of social research
Thomson/Wadsworth, 2004
Buku Teks SO
Babbie, Earl R.
The practice of social research
Wodsworth, 1986
Buku Teks SO
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