Wilson, Steve D.
Burgess, 1967
Buku Teks
New York: McGraw-Hill Internanational Book Company, 1995,
Buku Referensi
edited by R. Barer and V.E. Cosslett
Academic Press, 1984
Buku Teks
Mittal, Vikas
Springer, 2012
eBooks
Wallis, T. E.
Little, Brown, 1965
Buku Teks