Richard Arum, Irenee R. Beattie, Merced, Karly Ford, editors
SAGE Publications, 2015
Buku Teks
edited by Robert H. Beck
National Association of Social Workers, 1965
Buku Teks
Stephen Pratama, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2016
UI - Skripsi Membership
Zvi Bekerman
Springer, 2012
eBooks
Wolf, Richard M., author
Praeger, 1979
Buku Teks