Newitt, Jay S., author
Pearson-Prentice Hall, 2005
Buku Teks
Levy, Sidney M., author
McGraw-Hill , 2002
Buku Teks
Levy, Sydney M., author
McGraw-Hill , [Date of publication not identified]
Buku Teks
Levy, Sidney M., author
McGraw-Hill, 2012
Buku Teks
Ahuja, Hira N., author
John Wiley & Sons, 1994
Buku Teks