References

 1.  Increasing ROI  Lipton, David (October 2002). Foodservice and Hospitality.
 2.  Staff Training  Lipton, David (September 2002). Foodservice and Hospitality.
 3.  Augmenter la rentabilité  Lipton, David (October 2002). Foodservice and Hospitality.
 4.  Formation du personnel  Lipton, David (September 2002). Foodservice and Hospitality.
     
     
     
     
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