Hopper, Melvyn A.
Eurasia Media, 1985
Buku Teks
Downes, John, author
barron's, 2006
Buku Teks
Siegel, Joel G., author
Macmillan, 1992
Buku Referensi
Prindl, Andreas R., author
John Wiley & Sons, 1981
Buku Teks
Chew, David B. H.
Printers and Converters Ltd., 1973
Buku Teks