Orig, T. S. (1997). UPLB professor honored by IOWA State University alumni. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Orig, Thor S. "UPLB Professor Honored by IOWA State University Alumni." Manila Bulletin 1997.
Lua MLA (9ú heag.)Orig, Thor S. "UPLB Professor Honored by IOWA State University Alumni." Manila Bulletin, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.