Autor, R. (2000). Serving others: A social responsibility. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAutor, Roberto. "Serving Others: A Social Responsibility." Manila Bulletin 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAutor, Roberto. "Serving Others: A Social Responsibility." Manila Bulletin, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.