Dittmer, P., & Keefe, J. D. (2009). Principles of food, beverage, and labor cost controls (9th ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)Dittmer, Paul, agus J. Desmond Keefe. Principles of Food, Beverage, and Labor Cost Controls. 9th ed. Hoboken, N.J: Wiley, 2009.
Lua MLA (9ú heag.)Dittmer, Paul, agus J. Desmond Keefe. Principles of Food, Beverage, and Labor Cost Controls. 9th ed. Wiley, 2009.
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