APA (7 वां संस्करण) प्रशस्ति पत्र

(2004). Apostol delivers Plaridel lecture at UP Monday. Philippine Daily Inquirer.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

"Apostol Delivers Plaridel Lecture at UP Monday." Philippine Daily Inquirer 2004.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

"Apostol Delivers Plaridel Lecture at UP Monday." Philippine Daily Inquirer, 2004.