DIANSARI SOLIHAH AMINI (2008) KERJASAMA SISTER PROVINCE PROPINSI DAERAH ISTIMEWA YOGYAKATA DENGA PROPINSI CHIANG MAI THAILAND (SISTER PROVINCE BETWEEN THE PRONINCE OF CHIANG MAI THAILAND AND THE PRONINCE OF YOGYSKSRTS SPECIAL REGION). S1 thesis, Universitas Muhammadiyah Yogyakarta.