Pan, I. L. (1998). Oil import bill surges 22% to $3B in 1997. Manila Times.
Cita Chicago Style (17a ed.)Pan, Isabel L. "Oil Import Bill Surges 22% to $3B in 1997." Manila Times 1998.
Cita MLA (9a ed.)Pan, Isabel L. "Oil Import Bill Surges 22% to $3B in 1997." Manila Times, 1998.
Precaución: Estas citas no son 100% exactas.