Forte, Allen, author
MIT Press, 1968
Buku Teks
Harms, Edward, author
John Wiley & Sons, 1977
Buku Teks
Dinter, Heinz, author
Macmillan, 1973
Buku Teks
Glinert, Ephraim P.
Prentice Hall International, 1983
Buku Teks
Monro, Donald M., author
Edward Arnold, 1974
Buku Teks