Teorey, Toby J.
Englewood Cliffs, NJ: Prentice-Hall, 1982
Buku Teks
Whittington, R.P.
Clarendon Press , 1988
Buku Teks
Date, C.J.
Addison-Wesley, 1981
Buku Teks
Date, C.J.
Addison-Wesley, 1981
Buku Teks
Elmasri, Ramez
Benjamin Cummings, 1989
Buku Teks