APA (7th ed.) Citation

SPANGENBERG, K. R. Vacuum Tubes. McGraw-Hill Book Company.

Chicago Style (17th ed.) Citation

SPANGENBERG, Karl R. Vacuum Tubes. McGraw-Hill Book Company.

MLA (8th ed.) Citation

SPANGENBERG, Karl R. Vacuum Tubes. McGraw-Hill Book Company.

Warning: These citations may not always be 100% accurate.