Wengert, E. S. (1957). GSIS: Reflections on reform and reorganization. Philippine Journal of Public Administration.
Lua i Stíl Chicago (17ú heag.)Wengert, Egbert S. "GSIS: Reflections on Reform and Reorganization." Philippine Journal of Public Administration 1957.
Lua MLA (9ú heag.)Wengert, Egbert S. "GSIS: Reflections on Reform and Reorganization." Philippine Journal of Public Administration, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.