Clifford, S. H., & Coulthard, G. J. (2002). Microsoft Excel 2002 (Complete ed.). McGraw-Hill/Irwin.

Clifford, Sarah Hutchinson, and Glen J. Coulthard. Microsoft Excel 2002. Complete ed. Boston, Mass.: McGraw-Hill/Irwin, 2002.

Clifford, Sarah Hutchinson, and Glen J. Coulthard. Microsoft Excel 2002. Complete ed. McGraw-Hill/Irwin, 2002.