(1998). Fifteen years of leadership in educational publishing. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Fifteen Years of Leadership in Educational Publishing." Philippine Daily Inquirer 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Fifteen Years of Leadership in Educational Publishing." Philippine Daily Inquirer, 1998.
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