Title. (1995). IBON Philippines profile: Region II: Cagayan Valley (First ed.). IBON Philippines Databank & Research Center.
Chicago-viite (17. p.)Title. IBON Philippines Profile: Region II: Cagayan Valley. First ed. Manila: IBON Philippines Databank & Research Center, 1995.
MLA-viite (9. p.)Title. IBON Philippines Profile: Region II: Cagayan Valley. First ed. IBON Philippines Databank & Research Center, 1995.
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