E.J. Brill's first encyclopaedia of Islam 1913-1936; Volume 3
edited by M. Th. Houtsma, A.J. Wensick, T.W. Arnold, W. Heffening and E. Levi-Provencal
E.J. Brill, 1993
 Buku Referensi
E.J. Brill's first encyclopaedia of Islam 1913-1936; Volume 4
edited by M.Th. Houtsma, A.J. Wensunck, T.W. Arnold, W. Heffening and E. Levi-Provencal
E.J. Brill, 1993
 Buku Referensi
E.J. Brill's first encyclopaedia of Islam 1913-1936; Volume 5
edited by M.Th. Houtsma, A.J. Wensinck, E. Levi-provencal, H.A.R. Gibb and W. Heffening
E.J. Brill, 1993
 Buku Referensi
E.J. Brill's first encyclopaedia of Islam 1913-1936; Volume 6
edited by M.Th. Houtsma, A,J, Wensinck, E. Levi-Provencal, H.A.T. Gibb and W. Heffeinig
E.J. Brill, 1993
 Buku Referensi
E.J. Brill's first encyclopaedia of Islam 1913-1936; Volume 9
edite by M.Th. Houtsma, A.J. Wensinck, H.A.R. Gibb, W. Heffening and E. Levi-provencal
E.J. Brill, 1993
 Buku Referensi