APA (7 वां संस्करण) प्रशस्ति पत्र

Zafra, N. 1. (1967). Philippine history through selected sources. Alemar-Phoenix Pub. House.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Zafra, Nicolas 1892. Philippine History Through Selected Sources. Quezon City: Alemar-Phoenix Pub. House, 1967.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Zafra, Nicolas 1892. Philippine History Through Selected Sources. Alemar-Phoenix Pub. House, 1967.