Spangenberg, K. R. (1948). Vacuum tubes. McGraw-Hill.
Chicago Style (17th ed.) CitationSpangenberg, Karl Rudolph. Vacuum Tubes. New York: McGraw-Hill, 1948.
MLA (9th ed.) CitationSpangenberg, Karl Rudolph. Vacuum Tubes. McGraw-Hill, 1948.
Warning: These citations may not always be 100% accurate.