#VALUE!. (1999). Working with Excel (1st edition.). Tata McGraw-Hill.
Cita Chicago (17th ed.)#VALUE!. Working with Excel. 1st edition. New Delhi: Tata McGraw-Hill, 1999.
Cita MLA (9th ed.)#VALUE!. Working with Excel. 1st edition. Tata McGraw-Hill, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.