(1)
Department of Food Service Industry, Faculty of Economics and Business, Universitas Ahmad Dahlan, Yogyakarta, Indonesia
,
(2)
Department of Animal Products Technology, Faculty of Animal Science, Universitas Gadjah Mada, Yogyakarta, Indonesia
,
(3)
Department of Management, Faculty of Economics and Business Universitas Gadjah Mada, Yogyakarta, Indonesia
