APA (7th ed.) Citation

Lang, J. G. R. (1978). The magnetic field. Siemens.

Chicago Style (17th ed.) Citation

Lang, Johannes G. R. The Magnetic Field. Berlin [u.a.]: Siemens, 1978.

MLA (9th ed.) Citation

Lang, Johannes G. R. The Magnetic Field. Siemens, 1978.

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