Gips, J. (1997). Mastering Excel: A problem-solving approach. Wiley.
Lua i Stíl Chicago (17ú heag.)Gips, James. Mastering Excel: A Problem-solving Approach. New York: Wiley, 1997.
Lua MLA (9ú heag.)Gips, James. Mastering Excel: A Problem-solving Approach. Wiley, 1997.
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