APA (7 वां संस्करण) प्रशस्ति पत्र

(2001). Zumel, ex-newsman and NDF leader, dies. Philippine Daily Inquirer.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

"Zumel, Ex-newsman and NDF Leader, Dies." Philippine Daily Inquirer 2001.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

"Zumel, Ex-newsman and NDF Leader, Dies." Philippine Daily Inquirer, 2001.