Umez-Eronini, Eronini, author
PWS Publishing, 1999
Buku Teks
Padiyar, K.R., author
John Wiley & Sons, 1996
Buku Teks
Beards, C.F., author
Ellis Horwood, 1981
Buku Teks
Ogata, Katsuhiko, author
Prentice-Hall, 1992
Buku Teks
Palm III, William J., author
McGraw-Hill, 2010
Buku Teks