Tung Desem Waringin, author
Gramedia Pustaka Utama, 2008
Buku Teks
Brown, Stephen, author
Sage Publications, 2001
Buku Teks
Brierty, Edward G., author
Prentice-Hall, 1998
Buku Teks
Bradley, Frank, author
John Wiley & Sons, Ltd, 2003
Buku Teks
McCarthy, E. Jerome, author
Irwin, 1988
Buku Teks