Delfin, F. G., Jr. (2001). The national wealth tax on indigenous energy resources: Policy framework and implementation. Philippine Journal of Public Administration.
Lua i Stíl Chicago (17ú heag.)Delfin, Francisco G., Jr. "The National Wealth Tax on Indigenous Energy Resources: Policy Framework and Implementation." Philippine Journal of Public Administration 2001.
Lua MLA (9ú heag.)Delfin, Francisco G., Jr. "The National Wealth Tax on Indigenous Energy Resources: Policy Framework and Implementation." Philippine Journal of Public Administration, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.