Villalon, A. F. (2008). Sustainable development, ancient Cordillera-style. Philippine Daily Inquirer.
Cita Chicago (17th ed.)Villalon, Augusto F. "Sustainable Development, Ancient Cordillera-style." Philippine Daily Inquirer 2008.
Cita MLA (9th ed.)Villalon, Augusto F. "Sustainable Development, Ancient Cordillera-style." Philippine Daily Inquirer, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.