Biggs, Norman L., author
Clarendon Press, 1989
Buku Teks
by V.A. Dyck ... [and others]
Prentice-Hall, 1982
Buku Teks
Glinert, Ephraim P.
Prentice Hall International, 1983
Buku Teks
Tucker, Allen B., author
Holt Rinehart and Winston, 1983
Buku Teks
Cooper, James W., author
John Wiley & Sons, 1981
Buku Teks