Buchanan, Bill, author
Kluwer Academic Publishers, 1999
Buku Referensi
NCC Publications, 1984
Buku Referensi
Tooley, Michael H., author
Boston Newnes, 1992
Buku Teks
Black, Uyless D., author
A Reston Book, 1987
Buku Teks
edited by S. Ramani
North Holland, 1981
Buku Teks