Pacey, Desmond, author
Ryerson Press, 1952
Buku Teks
Simon & Pierre Pub. Co, 1972-
Buku Teks
The University of Michigan, 1998
Buku Teks
edited by Leila Kosseim and Diana Inkpen
Springer-Verlag, 2012
eBooks
Stanat, Donald D.
Prentice-Hall, 1977
Buku Teks