Zafra, N. 1. (1967). Philippine history through selected sources. Alemar-Phoenix Pub. House.
Lua i Stíl Chicago (17ú heag.)Zafra, Nicolas 1892. Philippine History Through Selected Sources. Quezon City: Alemar-Phoenix Pub. House, 1967.
Lua MLA (9ú heag.)Zafra, Nicolas 1892. Philippine History Through Selected Sources. Alemar-Phoenix Pub. House, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.