Pitt, H. M. (1977). Reciprocity and the Philippine Islands [microform]. Photoduplication Service, University of the Philippines Library.
芝加哥风格引文Pitt, Harold M. Reciprocity and the Philippine Islands [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
MLA引文Pitt, Harold M. Reciprocity and the Philippine Islands [microform]. Photoduplication Service, University of the Philippines Library, 1977.
警告：这些引文格式不一定是100％准确.