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, 1998
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Babbie, Earl R.
The practice of social research
Wadsworth and Cengage Learning, 2013
 Buku Teks SO
Babbie, Earl R.
The practice of social research
Cengage Learning, 2016
 Buku Teks SO