Mangahas, M. (2007). Measuring happines and freedom. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Mangahas, Mahar. "Measuring Happines and Freedom." Philippine Daily Inquirer 2007.
Lua MLA (9ú heag.)Mangahas, Mahar. "Measuring Happines and Freedom." Philippine Daily Inquirer, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.