Cita APA (7th ed.)

LEON, A. (1999). SQL: A COMPLETE REFRENCE. TATA MC-GRAW HILL PUBLISHING CO.LTD.

Cita Chicago (17th ed.)

LEON, A. SQL: A COMPLETE REFRENCE. NEW DELHI: TATA MC-GRAW HILL PUBLISHING CO.LTD, 1999.

Cita MLA (9th ed.)

LEON, A. SQL: A COMPLETE REFRENCE. TATA MC-GRAW HILL PUBLISHING CO.LTD, 1999.