Salgado, P. V. (2002). Cagayan Valley and Eastern Cordillera, 1581-1898. [publisher not identified].
Chicago-viite (17. p.)Salgado, Pedro V. Cagayan Valley and Eastern Cordillera, 1581-1898. [Place of publication not identified]: [publisher not identified], 2002.
MLA-viite (9. p.)Salgado, Pedro V. Cagayan Valley and Eastern Cordillera, 1581-1898. [publisher not identified], 2002.
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