(1997). Longer lifespans and age-related problems. Manila Bulletin.
Cita Chicago (17th ed.)"Longer Lifespans and Age-related Problems." Manila Bulletin 1997.
Cita MLA (9th ed.)"Longer Lifespans and Age-related Problems." Manila Bulletin, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.