APA (7th ed.) Citation

Davidson, D. A., & Bridges, E. M. (1981). Principles and applications of soil geography. Longman.

Chicago Style (17th ed.) Citation

Davidson, Donald A., and E. M. Bridges. Principles and Applications of Soil Geography. London New York: Longman, 1981.

MLA (9th ed.) Citation

Davidson, Donald A., and E. M. Bridges. Principles and Applications of Soil Geography. Longman, 1981.