De Guzman, G. (2011). Investing in the future. Philippines Free Press.
Lua i Stíl Chicago (17ú heag.)De Guzman, Guiller. "Investing in the Future." Philippines Free Press 2011.
Lua MLA (9ú heag.)De Guzman, Guiller. "Investing in the Future." Philippines Free Press, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.