Indonesia. Directorate General of Tourism
Wahyu Promospirit, 1990
Buku Referensi
Wang, Qicheng, author
China Intercontinental Press, 2009
Buku Teks
Wang, Qicheng, author
China Intercontinental Press, 2010
Buku Teks
Wang, Qicheng, author
China Intercontinental Press, 2009
Buku Teks
Kharisma Kamal Nugraha Rakhmatullah, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Tugas Akhir