Tini Ismiyani
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2006
UI - Skripsi (Membership)
Tokyo, Kasumigasaki Chiyoda-ku J.N.T.O, 1993.,
Buku Teks
Agus Sardjono
Faculty of Law University of Indonesia, 2016
Artikel Jurnal
Korea Tourism Organization, [date of publication not identified]
Buku Teks
Travel Bureau, 1975
Buku Referensi