Strong, R. P. Some questions relating to virulence of micro-organisms, with particular reference to their immunizing powers [microform]. Photoduplication Service. University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Strong, Richard Pearson. Some Questions Relating to Virulence of Micro-organisms, with Particular Reference to Their Immunizing Powers [microform]. Quezon City: Photoduplication Service. University of the Philippines Library.
Lua MLA (9ú heag.)Strong, Richard Pearson. Some Questions Relating to Virulence of Micro-organisms, with Particular Reference to Their Immunizing Powers [microform]. Photoduplication Service. University of the Philippines Library.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.