Kharofa, Ala Eddin, author
A.S. Noordeen, 2009
Buku Teks
edited by Marylin J. Raisch
Oceana, 1995
Buku Teks
Folsom, Ralph Haughwout, author
St. Paul, Minn, 1995
Buku Teks
Briggs, Lawrence Palmer
The American Philosophical Society, 1951
Buku Teks
London : Asher & Co
Majalah, Jurnal, Buletin