Mandl, Matthew
Reston Publishing Company, 1980
Buku Referensi
Gibson, J.R.
Newnes , 2002
Buku Teks
Temes, Lloyd
McGraw-Hill, 1977
Buku Teks
Jones, Martin Hartley, 1942-
Cambridge University Press, 1985
Buku Teks
Weyerer, Manfred
Prentice-Hall, 1992
Buku Teks