Glenn, J. A.
Harper and Row, 1984
Buku Referensi
James, James
Van Nostrand Reinhold, 1976
Buku Referensi
edited by David Nelson
Penguin Books, 2003
Buku Referensi
editor in chief, Sybil P. Parker
McGraw-Hill, 1997
Buku Referensi
The MIT Press, 1987,
Buku Referensi