[Philippines (Commonwealth) Department of Agriculture and Commerce. Soils of Cagayan, Isabela, Negros Occidental, and Nueva Vizcaya. [s.n.
Цитирование в стиле Чикаго (17-е изд.)[Philippines (Commonwealth) Department of Agriculture and Commerce. Soils of Cagayan, Isabela, Negros Occidental, and Nueva Vizcaya. Manila: [s.n.
Цитирование MLA (9-е изд.)[Philippines (Commonwealth) Department of Agriculture and Commerce. Soils of Cagayan, Isabela, Negros Occidental, and Nueva Vizcaya. [s.n.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.