Twomey, David P.
South-Western Publishing Company, 1986
Buku Teks
Player, Macka
West Publishing, 1992
Buku Teks
Chandran, Ravi, author
Prentice-Hall, 2005
Buku Teks
Jefferson, Michael
Cavendish Publishing , 1994
Buku Teks
by Akira Takanashi [and others]
The Japan Institut of Labor , 1997
Buku Teks