international student conference on humanity issues 2015 - Yusuf Susanto,Satrio Peringgo S,Della N; Iman Sumarlan; Hardi Alunaza, Anjar Nugroho;Bambang Widianto A; Naim, Aiddaris Budiah; Restu P, Burhan Hakim (MIHI UMY, 2015)