Clowers, Myles L., author
McGraw-Hill, 1973
Buku Teks
Clowers, Myles L., author
McGraw-Hill, 1977
Buku Teks
Starling, Grover, author
The Dorsey Press, 1982
Buku Teks
Mayer, David Y.
Dellasta, 1988
Buku Teks
Lee, Brian, author
Longman , 1993
Buku Teks