Gaya APA
Oppel, A., Sheldon, R.
(2009).
SQL A Beginner's Guide
(
Ed.3)
.
USA:
Mc Graw Hill.
Gaya MLA
Oppel, Andy., Sheldon, Robert.
"SQL A Beginner's Guide".
Ed.3
USA:
Mc Graw Hill,
2009.
Text.