SZYMANSKI, R. A. (1995). Computers and Information Systems. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)SZYMANSKI, Robert A. Computers and Information Systems. Prentice Hall, 1995.
Lua MLA (8ú heag.)SZYMANSKI, Robert A. Computers and Information Systems. Prentice Hall, 1995.
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