Duval, Evelyn Millis, author
Harper & Row, 1985
Buku Teks
Casper, Lynne M., author
Sage, 2000
Buku Teks
Hackstaff, Karla B.
Temple University Press , 1999
Buku Teks
edited, Catherine S. Chilman
Sage Publications, 1988
Buku Teks
Allyn and Bacon, 1992
Buku Teks