APA (7 वां संस्करण) प्रशस्ति पत्र

(1997). Longer lifespans and age-related problems. Manila Bulletin.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

"Longer Lifespans and Age-related Problems." Manila Bulletin 1997.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

"Longer Lifespans and Age-related Problems." Manila Bulletin, 1997.