Yogyakarta, D. I. (1997). YOGYAKARTA GUIDE BOOK (BUSINESS, INDUSTRY, TOURISM & INVESTMENT). [s.n].
Chicago-viite (17. p.)Yogyakarta, Daerah Istimewa. YOGYAKARTA GUIDE BOOK (BUSINESS, INDUSTRY, TOURISM & INVESTMENT). [s.n], 1997.
MLA-viite (8. p.)Yogyakarta, Daerah Istimewa. YOGYAKARTA GUIDE BOOK (BUSINESS, INDUSTRY, TOURISM & INVESTMENT). [s.n], 1997.
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