Babbie, Earl, author
Wadsworth, 2010
Buku Teks
Babbie, Earl, author
Thomson/Wadsworth, 2004
Buku Teks
Babbie, Earl, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Babbie, Earl, author
Cengage Learning, 2016
Buku Teks
Babbie, Earl, author
Wadsworth, 1991
Buku Teks