Abadinsky, Howard, author
Prentice-Hall, 1979
Buku Teks
Wright, Burton, author
W.B. Saunders, 1978
Buku Teks
edited by Jerome H. Skolnick, Jane L. Scheiber
Publisher's, 1977
Buku Teks
Sheley, Joseph F., author
Wadsworth, 1987
Buku Teks
Tappan, Paul W., author
McGraw-Hill, 1960
Buku Teks