APA (7 वां संस्करण) प्रशस्ति पत्र

Philippine Printing Technical Foundation. (1990). Graphic arts directory. Published by the Philippine Printing Technical Foundation.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Philippine Printing Technical Foundation. Graphic Arts Directory. Manila: Published by the Philippine Printing Technical Foundation, 1990.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Philippine Printing Technical Foundation. Graphic Arts Directory. Published by the Philippine Printing Technical Foundation, 1990.