Shelly, G. B. (1985). Flowchart Structured cobol.
Tohutoru Kātū Chicago (17th ed.)Shelly, Gary B. Flowchart Structured Cobol. Saturn St., Brea, Ca.: Anaheim, 1985.
Tohutoro MLA (9th ed.)Shelly, Gary B. Flowchart Structured Cobol. 1985.
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