Subakti, Agung Gita, Hotel management Department, Faculty of Economics and Communication, Bina Nusantara University Syahdan Campus Jl. K. H. Syahdan No. 9, Kemanggisan / Palmerah Jakarta Barat 11480 Telp. : (+62 – 21) 534 – 5830, 535 – 0660 Fax. : (+62 – 21) 530 – 0244, Indonesia