• The Protected Area Visitor Impact Management (PAVIM) Framework

• Perkembangan Pariwisata Indonesia

• Hotel Management Team

• Faculty Member of Tourism Department

• Faculty Member of Hotel Management Department

• RECREATION OPPORTUNITY SPECTRUM

• Economic Valuation of National Park Indonesia

• DAYA DUKUNG LAHAN BAGI AKTIVITAS URBAN TOURISM

• Surakarta, The poorly Maintained Palace