Langner, Ralph, author
Momentum press, 2012
Buku Teks
Umez-Eronini, Eronini, author
PWS Publishing, 1999
Buku Teks
Shahian, Bahram
Englewood Cliffs, NJ: Prentice-Hall, 1993
Buku Teks
Padiyar, K.R., author
John Wiley & Sons, 1996
Buku Teks
Landau, Ioan Dore, author
Prentice Hall International, 1990
Buku Teks