Hartley, Keith
John Wiley & Sons, c.1981
Buku Teks
Katz, Michael L., author
Irwin McGraw-Hill, 1998
Buku Teks
Main, Robert S.
West Pub., 1977
Buku Teks
Nicholson, Walter, author
Dryden Press, 1994
Buku Teks
Nicholson, Walter, author
Dryden Press , 1983
Buku Teks