Valmonte, k. n. E. L. (1974). Hanggang kailan [microform]. Photoduplication Service.
芝加哥风格引文Valmonte, katha ni Engracio L. Hanggang Kailan [microform]. Quezon City: Photoduplication Service, 1974.
MLA引文Valmonte, katha ni Engracio L. Hanggang Kailan [microform]. Photoduplication Service, 1974.
警告：这些引文格式不一定是100％准确.