Gaya APA

Christopher, V, B. (1991). Spreadshut Publishing With Quattro Pro Producing Effective Attractive Charts, Graphs, Tables & Presentation for Versions 2.0 & 3.0 . America: Ventaro Press.

Gaya MLA

Christopher, Van, Buren,. "Spreadshut Publishing With Quattro Pro Producing Effective Attractive Charts, Graphs, Tables & Presentation for Versions 2.0 & 3.0". America: Ventaro Press, 1991. Text.