Ordoñez, E. M. (2013). Inventions that actually aid farmers. IN Commentary [column]. Philippine Daily Inquirer.
Chicago-viite (17. p.)Ordoñez, Ernesto M. "Inventions That Actually Aid Farmers. IN Commentary [column]." Philippine Daily Inquirer 2013.
MLA-viite (9. p.)Ordoñez, Ernesto M. "Inventions That Actually Aid Farmers. IN Commentary [column]." Philippine Daily Inquirer, 2013.
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