Barnes, Winston H.F.
Adam & Charles Black, 1950
Buku Teks
Ahmed, Akbar S.
Routledge, 1995
Buku Teks
Cahn, Edmond
Vakils, Feffer and Simons, 1961
Buku Teks
Spooner, F.P.
Fredereck A.Praeger Publisher, 1960
Buku Teks
Clifford, James, 1945-
Harvard University Press, 1988
Buku Teks