APA (7th ed.) Citation

Offner, F. (1940). Recorder for electrical potentials. Journal of Applied Physics, 11, 347. https://doi.org/10.1063/1.1712782

Chicago Style (17th ed.) Citation

Offner, F. "Recorder for Electrical Potentials." Journal of Applied Physics 11 (1940): 347. https://doi.org/10.1063/1.1712782.

MLA (9th ed.) Citation

Offner, F. "Recorder for Electrical Potentials." Journal of Applied Physics, vol. 11, 1940, p. 347, https://doi.org/10.1063/1.1712782.