Zafra, N. 1. (1967). Philippine history through selected sources. Alemar-Phoenix Pub. House.
Chicago-viite (17. p.)Zafra, Nicolas 1892. Philippine History Through Selected Sources. Quezon City: Alemar-Phoenix Pub. House, 1967.
MLA-viite (9. p.)Zafra, Nicolas 1892. Philippine History Through Selected Sources. Alemar-Phoenix Pub. House, 1967.
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