APA (7th ed.) Citation

Contreras, V. (2005). Federalism pros, cons explained. Philippine Daily Inquirer.

Chicago Style (17th ed.) Citation

Contreras, Voltaire. "Federalism Pros, Cons Explained." Philippine Daily Inquirer 2005.

MLA (9th ed.) Citation

Contreras, Voltaire. "Federalism Pros, Cons Explained." Philippine Daily Inquirer, 2005.

Warning: These citations may not always be 100% accurate.