APA (7 वां संस्करण) प्रशस्ति पत्र

Martinez, V. A., Plopino, R. F., & Valera, J. B. (1987). An introduction to extension delivery systems. Island Pub. House.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Martinez, Vicente A., Ramiro F. Plopino, और Jaime B. Valera. An Introduction to Extension Delivery Systems. Manila: Island Pub. House, 1987.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Martinez, Vicente A., et al. An Introduction to Extension Delivery Systems. Island Pub. House, 1987.