Philippines. Regional Development Council, Region II. (1977). Cagayan Valley regional development plan, 1978-1982. RDC II.
Citazione stile Chigago Style (17a edizione)Philippines. Regional Development Council, Region II. Cagayan Valley Regional Development Plan, 1978-1982. Tuguegarao City: RDC II, 1977.
Citatione MLA (9a ed.)Philippines. Regional Development Council, Region II. Cagayan Valley Regional Development Plan, 1978-1982. RDC II, 1977.
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