Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Chapman, Sydney, y Julius Bartels. Geomagnetism. Oxford: At the Clarendon Press, 1940.

Cita MLA (8a ed.)

Chapman, Sydney, y Julius Bartels. Geomagnetism. At the Clarendon Press, 1940.