Roperos, G. M. (1976). Mapig-ot and dalan paingon sa kabulahanan [microform]. Photoduplication Service.
芝加哥风格引文Roperos, Godofredo M. Mapig-ot and Dalan Paingon Sa Kabulahanan [microform]. Quezon City: Photoduplication Service, 1976.
MLA引文Roperos, Godofredo M. Mapig-ot and Dalan Paingon Sa Kabulahanan [microform]. Photoduplication Service, 1976.
警告：这些引文格式不一定是100％准确.