Gaya APA

Dittmer, P, R., Griffin, G, G. (1993). Principles of food, beverage, and labor cost controls for hotels and restaurants (5th ed.). New York: Van Nostrand Reinhold.

Gaya MLA

Dittmer, Paul, R.., Griffin, Gerald, G.. "Principles of food, beverage, and labor cost controls for hotels and restaurants". 5th ed. New York: Van Nostrand Reinhold, 1993. BUKU.