APA (7th ed.) Citation

Ragg, J. M., & Clayden, B. (1973). The classification of some British soils according to the comprehensive system of the United States.

Chicago Style (17th ed.) Citation

Ragg, J. M., and Benjamin Clayden. The Classification of Some British Soils According to the Comprehensive System of the United States. Harpenden, 1973.

MLA (9th ed.) Citation

Ragg, J. M., and Benjamin Clayden. The Classification of Some British Soils According to the Comprehensive System of the United States. 1973.