Coker, A. Kayode, author
Gulf Professional Publishing, 2001
Buku Teks
Coker, A. Kayode
Butterworth-Heinemann, 2001
Multimedia
Walas, Stanley M., author
McGraw-Hill Company, 1975
Buku Teks
Shkarofsky, I.P.
Addison-Wesley, 1966
Buku Teks
Ash, Milton S., author
McGraw-Hill, 1979
Buku Teks