Adams, Gerald R.
Books Cole Publishing Company, 1983
Buku Teks
Skolnick, Jerome H., author
Little, Brown, 1985
Buku Teks
Cuber, John F
Henry Holt And Company, 1951
Buku Teks
University of Chicago Press, 1988
Buku Teks
Raffaele, Joseph Antonio
John Wiley & Sons, 1974
Buku Teks