CAGAN, C. (1973). Data Management System / Carl Cagan. Melville.
Lua i Stíl Chicago (17ú heag.)CAGAN, Carl. Data Management System / Carl Cagan. Melville, 1973.
Lua MLA (8ú heag.)CAGAN, Carl. Data Management System / Carl Cagan. Melville, 1973.
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