Donzel, E. Van
E.J. Brill, 1994
Buku Referensi
Khan, Muhammad Akram
Routledge, 2003
Buku Referensi
editors, Gerald P. Koocher, John C. Norcross, Sam S. Hill, III
Oxford University Press, 2005
Buku Teks
editors, Gerald P. Koocher, John C. Norcross, Sam S. Hill, III.
Oxford University Press, 2005
Buku Teks
New-York: Prentice Hall, 1993,
Buku Referensi