APA (7 वां संस्करण) प्रशस्ति पत्र

Pineda, E. L. (2000). Obligations and contracts. Central Professional Books.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Pineda, Ernesto L. Obligations and Contracts. Quezon City: Central Professional Books, 2000.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Pineda, Ernesto L. Obligations and Contracts. Central Professional Books, 2000.