Redman, Peter, author
Sage, 2001
Buku Teks
Lior Gideon
Springer Science, 2012
eBooks
edited by Crispian Scully
Oxford University Press, 2002
Buku Referensi
Guth, Hans P., author
Wadsworth, 1969
Buku Teks
Mahmoud, Shah, author
Betterway, 1992
Buku Referensi