APA Style

Spangenberg, K, R. (1948). Vacuum Tubes / Karl R. Spangenberg (1). New York: McGraw-Hill.

MLA Style

Spangenberg, Karl, R.. "Vacuum Tubes / Karl R. Spangenberg". 1 New York: McGraw-Hill, 1948. Textbook ห้องสมุดทั่วไป.