Molluzzo, J. C. (1987). Structured COBOL programming. Wadsworth.
Lua i Stíl Chicago (17ú heag.)Molluzzo, John C. Structured COBOL Programming. Belmont, Calif: Wadsworth, 1987.
Lua MLA (9ú heag.)Molluzzo, John C. Structured COBOL Programming. Wadsworth, 1987.
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