Currie, Elliott, author
Little, Brown, 1984
Buku Teks
Goldston, Eli, author
Carnegie-Mellon University , 1971
Buku Teks
edited by Earl Rubington and Martin S. Weinberg
Oxford University Press, 2011
Buku Teks
White, James J., author
West Group, 1995
Buku Teks
Crampton, Helen M.
Ramdon House, 1970
Buku Teks