APA (7th ed.) Citation

Spangenberg, K. R. (1948). Vacuum tubes (1. ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Spangenberg, Karl R. Vacuum Tubes. 1. ed. New York [u.a.]: McGraw-Hill, 1948.

MLA (9th ed.) Citation

Spangenberg, Karl R. Vacuum Tubes. 1. ed. McGraw-Hill, 1948.