Knuth, A.M.L. (Alphonse-Maria Leo), author
Rodopi, 1976
Buku Teks
Lull, James, author
Colombia University Press, 1995
Buku Teks
Blackwell, 2007
eBooks
O`Rourke IV, James S., author
Pearson Prentice Hall, 2004
Buku Teks
Dearing,James W.
Routledge, 1995
Buku Teks