Newman, William H.
Prentice-Hall, 1987
Buku Teks
Schnee, Jerome E.
Prentice-Hall, 1977
Buku Teks
Lundgren, Earl F., author
Confield, 1974
Buku Teks
Glueck, William F., author
McGraw-Hill, 1972
Buku Teks
Harrison, Allan, author
Prentice-Hall, 2002
Buku Teks