Tan, E. (1980). Sampling considerations for diseases with low prevelence [microform]. Photoduplication Service. University of the Philippines Library.
芝加哥风格引文Tan, Elizabeth. Sampling Considerations for Diseases with Low Prevelence [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1980.
MLA引文Tan, Elizabeth. Sampling Considerations for Diseases with Low Prevelence [microform]. Photoduplication Service. University of the Philippines Library, 1980.
警告：这些引文格式不一定是100％准确.