APA (7th ed.) Citation

Beck, A. H. W. (1948). Velocity-modulated thermionic tubes. University Press; Macmillan.

Chicago Style (17th ed.) Citation

Beck, A. H. W. Velocity-modulated Thermionic Tubes. Cambridge [England] : New York: University Press; Macmillan, 1948.

MLA (9th ed.) Citation

Beck, A. H. W. Velocity-modulated Thermionic Tubes. University Press; Macmillan, 1948.