APA Citation

Spangenberg, K. R. (1948). Vacum tubes. New York: McGraw-Hill.

Chicago Style Citation

Spangenberg, Karl R. Vacum Tubes. New York: McGraw-Hill, 1948.

MLA Citation

Spangenberg, Karl R. Vacum Tubes. New York: McGraw-Hill, 1948.

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