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Lua i Stíl Chicago (17ú heag.)Ojugo, Clemen. Practical Food & Beverage Cost ControlClement Ojugo. Delmar Publishers, 1999.
Lua MLA (8ú heag.)Ojugo, Clemen. Practical Food & Beverage Cost ControlClement Ojugo. Delmar Publishers, 1999.
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