APA (7th ed.) Citation

(1955). Soil map: Abra Province, Philippines. Bureau of Soils.

Chicago Style (17th ed.) Citation

Soil Map: Abra Province, Philippines. Manila: Bureau of Soils, 1955.

MLA (9th ed.) Citation

Soil Map: Abra Province, Philippines. Bureau of Soils, 1955.

Warning: These citations may not always be 100% accurate.