Saulo, A. B. (1975). Master of his soul: The life of Norberto Romualdez (1875-1941). National Historical Institute.
Lua i Stíl Chicago (17ú heag.)Saulo, Alfredo B. Master of His Soul: The Life of Norberto Romualdez (1875-1941). [Manila]: National Historical Institute, 1975.
Lua MLA (9ú heag.)Saulo, Alfredo B. Master of His Soul: The Life of Norberto Romualdez (1875-1941). National Historical Institute, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.