Pineno, C.J., author
Addison-Wesley, 1984
Buku Teks
Dupree, Dempsey
Addison-Wesley Pub. Co., 1984
Buku Teks
Carvan, J.C.
LBC Information Service, 1997
Buku Teks
Walstad, William B., author
McGraw-Hill, 2002
Buku Teks
Cavanaugh, Joseph M., author
Burgess, 1975
Buku Teks