Gaya APA

Dittmer, P, R., III, J, D, K. (2009). PRINCIPLES OF FOOD, BEVERAGE, AND LABOR COST CONTROLS (NINTH EDITION). United States of America: John Wiley & Sons,Inc..

Gaya MLA

Dittmer, Paul, R.., III, J., Desmond, Keefe. "PRINCIPLES OF FOOD, BEVERAGE, AND LABOR COST CONTROLS". NINTH EDITION United States of America: John Wiley & Sons,Inc., 2009. eBook.