APA-referens (7:e uppl.)

Dittmer, P., & Keefe, J. D. (2009). Principles of food, beverage, and labor cost controls (9th ed.). Wiley.

Chicago-referens (17:e uppl.)

Dittmer, Paul, och J. Desmond Keefe. Principles of Food, Beverage, and Labor Cost Controls. 9th ed. Hoboken, N.J: Wiley, 2009.

MLA-referens (9:e uppl.)

Dittmer, Paul, och J. Desmond Keefe. Principles of Food, Beverage, and Labor Cost Controls. 9th ed. Wiley, 2009.