[Philippines (Commonwealth) Department of Agriculture and Commerce. Soils of Cagayan, Isabela, Negros Occidental, and Nueva Vizcaya. [s.n.
Chicago Style (17th ed.) Citation[Philippines (Commonwealth) Department of Agriculture and Commerce. Soils of Cagayan, Isabela, Negros Occidental, and Nueva Vizcaya. Manila: [s.n.
MLA citiranje[Philippines (Commonwealth) Department of Agriculture and Commerce. Soils of Cagayan, Isabela, Negros Occidental, and Nueva Vizcaya. [s.n.
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