APA (7th ed.) Citation

Soil Survey of England and Wales & Hartnup, R. (1987). Soils in Powys R. Hartnup. Soil Survey of England and Wales.

Chicago Style (17th ed.) Citation

Soil Survey of England and Wales and R. Hartnup. Soils in Powys R. Hartnup. Harpenden: Soil Survey of England and Wales, 1987.

MLA (9th ed.) Citation

Soil Survey of England and Wales and R. Hartnup. Soils in Powys R. Hartnup. Soil Survey of England and Wales, 1987.

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