Cooper, P. (2004). Is gross income tax the best way forward. Philippine Daily Inquirer.
Cita Chicago (17th ed.)Cooper, Paul. "Is Gross Income Tax the Best Way Forward." Philippine Daily Inquirer 2004.
Cita MLA (9th ed.)Cooper, Paul. "Is Gross Income Tax the Best Way Forward." Philippine Daily Inquirer, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.