Rao, Singiresu S.
McGraw-Hill, 1992
Buku Teks
Kok-Kwang, Phoon, author
Taylor &Fransic, 2008
Buku Teks
Rao, Venkata
Times Books International , 1979
Buku Teks
Stephens, Matthew P., author
Pearson/Prentice Hall, 2004
Buku Teks
Rao, M.A.
National Book Trust, 1975
Buku Teks