Schwartz, Bernard, author
Little, Brown & Co., 1980
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Melbourne University Press, 1950
Buku Teks
Brown, L. Neville (Lionel Neville), author
Clarendon Press, 1998
Buku Teks
Andersen, William R., author
Carolina Academic Press, 2010
Buku Teks
Jain, MP , author
LexisNexis, 2011
Buku Teks