Katz, Jerome, author
McGraw-Hill, 2014
Buku Teks
Hodgetts, Richard M., author
John Wiley & Sons, 2002
Buku Teks
Adam, Bob
Adams Media Corporation, 1997
Multimedia
Hatten, Timothy S., author
Prentice-Hall, 1997
Buku Referensi
Proximore, Senator William, author
Henry Regnery, 1964
Buku Teks