Al-Rimawi, Lu`ayy Minwer, author
Wolters Kluwer Law & Business, 2012
Buku Teks
Sherman, Andrew J., author
Amacom, 2005
Buku Teks
Maftuh Ahnan, author
CV. Bintang Pelajar Group, [Date of publication not identified]
Buku Referensi
Srewart, Desmond
New York : Time Incorporated, c.1962.
Buku Teks
Patai, Raphael, author
Hatherleigh Press, 2002
Buku Teks