Norton, P. (2003). Excel 2002: A tutorial to accompany Peter Norton's introduction to computers (4th ed.). Glencoe/McGraw-Hill.
Cita Chicago (17th ed.)Norton, Peter. Excel 2002: A Tutorial to Accompany Peter Norton's Introduction to Computers. 4th ed. Columbus, OH: Glencoe/McGraw-Hill, 2003.
Cita MLA (8th ed.)Norton, Peter. Excel 2002: A Tutorial to Accompany Peter Norton's Introduction to Computers. 4th ed. Glencoe/McGraw-Hill, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.