APA (7th ed.) Citation

Penning, F. M. (1957). Electrical discharges in gases. Philips Technical Library.

Chicago Style (17th ed.) Citation

Penning, F. M. Electrical Discharges in Gases. La Haya: Philips Technical Library, 1957.

MLA (9th ed.) Citation

Penning, F. M. Electrical Discharges in Gases. Philips Technical Library, 1957.