APA (7th ed.) Citation

Epstein, K. (1981). Gain control interface for a nanovoltmeter. Journal of Physics. E, Scientific Instruments., 14, 1050.

Chicago Style (17th ed.) Citation

Epstein, K. "Gain Control Interface for a Nanovoltmeter." Journal of Physics. E, Scientific Instruments. 14 (1981): 1050.

MLA (9th ed.) Citation

Epstein, K. "Gain Control Interface for a Nanovoltmeter." Journal of Physics. E, Scientific Instruments., vol. 14, 1981, p. 1050.