Dittmer, P., & Keefe, J. D. (2009). Principles of food, beverage, and labor cost controls (9th ed.). Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDittmer, Paul, और J. Desmond Keefe. Principles of Food, Beverage, and Labor Cost Controls. 9th ed. Hoboken, N.J: Wiley, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDittmer, Paul, और J. Desmond Keefe. Principles of Food, Beverage, and Labor Cost Controls. 9th ed. Wiley, 2009.
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