APA (7th ed.) Citation

Barnard, G. P. (1930). The selenium cell: Its properties and applications. R.R. Smith.

Chicago Style (17th ed.) Citation

Barnard, George P. The Selenium Cell: Its Properties and Applications. New York: R.R. Smith, 1930.

MLA (9th ed.) Citation

Barnard, George P. The Selenium Cell: Its Properties and Applications. R.R. Smith, 1930.