Rothery, Brian
Pustaka Binaman Pressindo, 1996
Buku Teks
Goetsch, David L.
Prentice-Hall, 2002
Buku Teks
Lam, Siew Wah
McGraw-Hill, 1994
Buku Teks
Nee, Paul A.
John Wiley & Sons, 1996
Buku Teks
edited by Robert W. Peach
Irwin Professional, 1997
Buku Referensi