HANNA NUR AFIFAH YOGAR (2019) SELF-DETERMINATION AND SECESSION UNDER INTERNATIONAL LAW: A CASE STUDY OF CATALONIA. S1 thesis, UNIVERSITAS MUHAMMADIYAH YOGYAKARTA.
Umar Syarief Rumalutur (2019) STRATEGI MITIGASI DI KAWASAN POTENSI BENCANA TSUNAMI DI KABUPATEN BANTUL. S1 thesis, Universitas Muhammadiyah Yogyakarta.