MANNING, G. S., & MANNING, G. S. (1984). Cobol Basics A Structured Approach Gerry Manning. Random House.
Lua i Stíl Chicago (17ú heag.)MANNING, Gerryey S., agus Gerryey S. MANNING. Cobol Basics A Structured Approach Gerry Manning. Random House, 1984.
Lua MLA (8ú heag.)MANNING, Gerryey S., agus Gerryey S. MANNING. Cobol Basics A Structured Approach Gerry Manning. Random House, 1984.
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