Tan, E. (1980). Sampling considerations for diseases with low prevelence [microform]. Photoduplication Service. University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Tan, Elizabeth. Sampling Considerations for Diseases with Low Prevelence [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1980.
Lua MLA (9ú heag.)Tan, Elizabeth. Sampling Considerations for Diseases with Low Prevelence [microform]. Photoduplication Service. University of the Philippines Library, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.