[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 (9th ed.) Citation[Philippines (Commonwealth) Department of Agriculture and Commerce. Soils of Cagayan, Isabela, Negros Occidental, and Nueva Vizcaya. [s.n.
Warning: These citations may not always be 100% accurate.