Krumm, R. (1985). Understanding and using dBase II and III. Simon and Schuster.
Lua i Stíl Chicago (17ú heag.)Krumm, Rob. Understanding and Using DBase II and III. New York: Simon and Schuster, 1985.
Lua MLA (9ú heag.)Krumm, Rob. Understanding and Using DBase II and III. Simon and Schuster, 1985.
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