Mangahas, M. (2009). Can measuring happiness make people happy? Philippine Daily Inquirer.
Chicago-viite (17. p.)Mangahas, Mahar. "Can Measuring Happiness Make People Happy?" Philippine Daily Inquirer 2009.
MLA-viite (9. p.)Mangahas, Mahar. "Can Measuring Happiness Make People Happy?" Philippine Daily Inquirer, 2009.
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