Gaya APA

Dittmer, P, R., G., I, G, G. (1980). **Principles of food, beverage, & labor cost controls for hotels and ì restaurants . Australia: Australia: Van Nostrand Reinhold Company; 1980.

Gaya MLA

Dittmer, Paul, R.., G., I., Griffin,, Gerald. "**Principles of food, beverage, & labor cost controls for hotels and ì restaurants". Australia: Australia: Van Nostrand Reinhold Company; 1980, 1980. Text.