Stiling, Peter, author
Prentice-Hall, 2002
Buku Teks
Krebs, Charles J., author
Harper Collins, 1985
Buku Teks
Stiling, Peter D., author
Prentice Hall Inc., 1999
Buku Teks
Kumar, H.D., author
House PVT LTD, 1992
Buku Teks
McIntosh, Robert P.
Cambridge University Press, 1988
Buku Teks