Devine, Donald F., author
John Wiley & Sons, 1977
Buku Teks
Connelly, James F., author
Macmillan, 1978
Buku Teks
Alexander, Daniel C., author
Brooks/Cole Cengage Learning, 2011
Buku Teks
Ewen, Dale, author
Thomson Brooks/Cole, 2007
Buku Teks
Paige, Donald D.
Prindle, Weber & Schmidt Inc., 1969
Buku Teks