William S David. (1990). Computing fundamentals dBASE IV. Redwood City, California: Benjamins and Cummings.
シカゴスタイル引用形William S David. Computing Fundamentals DBASE IV. Redwood City, California: Benjamins and Cummings, 1990.
MLA引用形式William S David. Computing Fundamentals DBASE IV. Redwood City, California: Benjamins and Cummings, 1990.
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