Anderson, Ralph E.
Aldine, 1974
Buku Teks
Ashford, Jose B
Thomson Brooks, 2006
Buku Teks
edited by Gary T. Moore, Robert W. Marants
Plenum Press, 1997
Buku Teks
Zastrow, Charles
Cengage Learning, 2016
Buku Teks
Ashford, Jose B.
Wadsworth, 2001
Buku Teks