Hutchinson, S. E., & Sawyer, S. C. (1993). Dbase III plus. Irwin.
Lua i Stíl Chicago (17ú heag.)Hutchinson, Sarah E., agus Stacey C. Sawyer. Dbase III Plus. Illinois: Irwin, 1993.
Lua MLA (9ú heag.)Hutchinson, Sarah E., agus Stacey C. Sawyer. Dbase III Plus. Irwin, 1993.
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