Weinberg, Steven, 1933-
Vintage Books, 1993
Buku Teks SO
Sherratt, Yvonne
Cambridge University Press, 2006
Buku Teks SO
Kelly, J.M. [John Maurice]
Clarendon Press, 2005
Buku Teks SO
Pagels, Heinz R.
Simon and Schuster , 1988
Buku Teks SO
Chisholm, Roderick M.
Prentice-Hall International, 1989
Buku Teks SO