Ordoñez, E. M. (2013). Inventions that actually aid farmers. IN Commentary [column]. Philippine Daily Inquirer.
Chicago-referens (17:e uppl.)Ordoñez, Ernesto M. "Inventions That Actually Aid Farmers. IN Commentary [column]." Philippine Daily Inquirer 2013.
MLA-referens (9:e uppl.)Ordoñez, Ernesto M. "Inventions That Actually Aid Farmers. IN Commentary [column]." Philippine Daily Inquirer, 2013.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.