Philippines. Bureau of Soils. Soil map: Tarlac province. Bureau of Soils.
芝加哥风格引文Philippines. Bureau of Soils. Soil Map: Tarlac Province. Manila: Bureau of Soils.
MLA引文Philippines. Bureau of Soils. Soil Map: Tarlac Province. Bureau of Soils.
警告：这些引文格式不一定是100％准确.