Jennings, Karla, author
W.W. Norton, 1990
Buku Teks
edited by Michael L. Dertouzos and Joel Moses
MIT Press, 1979
Buku Teks
Scott, W. Richard, 1932-, author
Holt,Rinehart and winston, 1970
Buku Teks
Sherif, Muzafer, author
John Wiley & Sons, 1962
Buku Teks
Rockefeller College Press, 1988
Buku Teks