SPINETTO RICHERD D. (1991). LOTUS 1-2-3 WORK BOOK LEARN BY DOING IBM PC VERSION. GALGOTIA PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)SPINETTO RICHERD D. LOTUS 1-2-3 WORK BOOK LEARN BY DOING IBM PC VERSION. NEW DELHI: GALGOTIA PUBLICATIONS, 1991.
Lua MLA (9ú heag.)SPINETTO RICHERD D. LOTUS 1-2-3 WORK BOOK LEARN BY DOING IBM PC VERSION. GALGOTIA PUBLICATIONS, 1991.
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