Shelly, G. B., Cashman, T. J., & Vermaat, M. E. (1992). Learning to use microcomputer applications: Quattro Pro 3.0. Boyd & Fraser.
Cita Chicago (17th ed.)Shelly, Gary B., Thomas J. Cashman, i Misty E. Vermaat. Learning to Use Microcomputer Applications: Quattro Pro 3.0. Denver, Mass: Boyd & Fraser, 1992.
Cita MLA (9th ed.)Shelly, Gary B., et al. Learning to Use Microcomputer Applications: Quattro Pro 3.0. Boyd & Fraser, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.