Bausbacher, Ed, author
Prentice-Hall, 1993
Buku Teks
Pergamon Press, 1980
Buku Teks
Moore, James M., author
McMillan, 1962
Buku Teks
Apple, James M. (James MacGregor), 1915-1978, author
John Wiley & Sons, 1977
Buku Teks
Ireson, William Grant, 1914-, author
Prentice-Hall, 1959
Buku Teks