Spangenberg, K. R. (1948). Vacuum tubes. McGraw-Hill Book Co..
Chicago Edition CitationSpangenberg, Karl R. Vacuum Tubes. New York: McGraw-Hill Book Co., 1948.
MLA引文Spangenberg, Karl R. Vacuum Tubes. McGraw-Hill Book Co., 1948.
警告:這些引文格式不一定是100%准確.