APA استشهاد

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

استشهاد بنمط شيكاغو

Dittmer, Paul R; Author, و J Desmond; Author Keefe. Principles of Food, Beverage and Labour Cost Controls. 9th ed. New York, John Wiley & Sons, Inc, 2009.

MLA استشهاد

Dittmer, Paul R; Author, و J Desmond; Author Keefe. Principles of Food, Beverage and Labour Cost Controls. 9th ed. 2009.