Cox, Steven M., author
McGraw-Hill, 1998
Buku Teks
Blanchard, Robert E., author
John Wiley & Sons, 1975
Buku Teks
Roberson, Cliff, author
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Adams, Thomas F.
Prentice-Hall, 1980
Buku Teks
Muneeza, Aishath, author
A.S Noordeen, 2011
Buku Teks