Kochhar, N., & Gravina, E. (1998). Intoduction to Oracle:SQL and PL/SQL: Student guide. ORACLE SOFTWARE INDIA LIMITED.
Cita Chicago (17th ed.)Kochhar, Neena, i Ellen Gravina. Intoduction to Oracle:SQL and PL/SQL: Student Guide. ORACLE SOFTWARE INDIA LIMITED, 1998.
Cita MLA (9th ed.)Kochhar, Neena, i Ellen Gravina. Intoduction to Oracle:SQL and PL/SQL: Student Guide. ORACLE SOFTWARE INDIA LIMITED, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.