Quadagno, Jill S.
St. Martin's Press, 1980
Buku Teks SO
edited by Clark Tibbitts and Wilma Donahue
Prentice-Hall, 1960
Buku Teks SO
by Yoichi Okazaki [and others]
Foreign Press Center, 1990
Buku Teks SO
edited by John Field, Ronald J. Burke and Cary L. Cooper.
SAGE, 2013
Buku Referensi
Knutson, Andie L.
Russell Sage Foundation, 1971
Buku Teks SO