Shelly, G. B., & Cashman, T. J. (1990). Computer concepts with microcomputer applications: Lotus version. Boyd and Fraser.
Lua i Stíl Chicago (17ú heag.)Shelly, Gary B., agus Thomas J. Cashman. Computer Concepts with Microcomputer Applications: Lotus Version. U.S.A: Boyd and Fraser, 1990.
Lua MLA (9ú heag.)Shelly, Gary B., agus Thomas J. Cashman. Computer Concepts with Microcomputer Applications: Lotus Version. Boyd and Fraser, 1990.
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