Kelly, J. M. (John Maurice)
Clarendon Press, 2005
Buku Teks
Barnstone, Willis
Yale University Press, 1993
Buku Teks
Harrison, John B.
Alfred A. Knopf, 1966
Buku Teks
Kelly, L.G.
Basil Blackwell, 1979
Buku Teks
Nisbet, Robert A.
Oxford University Press, 1970
Buku Teks