McAllister, Richard, author
Routledge, 1997
Buku Teks
Rees, Leslie, 1905-2000, author
Angus and Roberson, 1973
Buku Teks
Nicoll, Allardyce, author
George G. Harrap, 1949
Buku Teks
Gibb, Hamilton A.R., Sir, author
Oxford University Press, 1949
Buku Teks
Spuler, Bertold, author
E.J. Brill, 1960
Buku Teks