APA (7th ed.) Citation

Chapman, S., & Bartels, J. (1940). Geomagnetism. Clarendon Press.

Chicago Style (17th ed.) Citation

Chapman, Sydney, and Julius Bartels. Geomagnetism. Oxford: Clarendon Press, 1940.

MLA (9th ed.) Citation

Chapman, Sydney, and Julius Bartels. Geomagnetism. Clarendon Press, 1940.

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