APA (7th ed.) Citation

Clarke, G. R. (1941). The study of the soil in the field (3rd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Clarke, G. R. The Study of the Soil in the Field. 3rd ed. [London], [New York, etc.]: Oxford University Press, 1941.

MLA (9th ed.) Citation

Clarke, G. R. The Study of the Soil in the Field. 3rd ed. Oxford University Press, 1941.