Shelly, G. B., Cashman, T. J., & Vermaat, M. E. (1992). Learning to use microcomputer applications: Quattro Pro 3.0. Boyd & Fraser.
Lua i Stíl Chicago (17ú heag.)Shelly, Gary B., Thomas J. Cashman, agus Misty E. Vermaat. Learning to Use Microcomputer Applications: Quattro Pro 3.0. Denver, Mass: Boyd & Fraser, 1992.
Lua MLA (9ú heag.)Shelly, Gary B., et al. Learning to Use Microcomputer Applications: Quattro Pro 3.0. Boyd & Fraser, 1992.
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