Gaya APA

Dittmer, P, , R., Griffin, G, , G. (1989). Principles of food, beverage and labor cost control for hotels and restaurants (4th. ed). New York: Van Nostrand Reinhold.

Gaya MLA

Dittmer, Paul, , R.., Griffin, Gerald, , G.. "Principles of food, beverage and labor cost control for hotels and restaurants". 4th. ed New York: Van Nostrand Reinhold, 1989. BUKU.