Zafra, N. (1993). The colonization of the Philippines and the beginnings of the Spanish city of Manila. National Historical Institute.
Lua i Stíl Chicago (17ú heag.)Zafra, Nicolas. The Colonization of the Philippines and the Beginnings of the Spanish City of Manila. Manila: National Historical Institute, 1993.
Lua MLA (9ú heag.)Zafra, Nicolas. The Colonization of the Philippines and the Beginnings of the Spanish City of Manila. National Historical Institute, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.