McCalla, R. (1985). Structured COBOL programming and data-processing methods. Brooks/Cole Pub Co.
Chicago Style (17. basım) AtıfMcCalla, Richard. Structured COBOL Programming and Data-processing Methods. Monterey, Calif: Brooks/Cole Pub Co, 1985.
MLA (9th ed.) AtıfMcCalla, Richard. Structured COBOL Programming and Data-processing Methods. Brooks/Cole Pub Co, 1985.
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