Santiago, R. (1999). International year of older persons. Manila Bulletin.
Cita Chicago (17th ed.)Santiago, Roni. "International Year of Older Persons." Manila Bulletin 1999.
Cita MLA (9th ed.)Santiago, Roni. "International Year of Older Persons." Manila Bulletin, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.