APA (7th ed.) Citation

Pendry, H. W. (1920). The Baudot printing telegraph system (2nd ed. (rev.).). Sir I. Pitman & Sons, ltd..

Chicago Style (17th ed.) Citation

Pendry, H. W. The Baudot Printing Telegraph System. 2nd ed. (rev.). London : New York: Sir I. Pitman & Sons, ltd., 1920.

MLA (9th ed.) Citation

Pendry, H. W. The Baudot Printing Telegraph System. 2nd ed. (rev.). Sir I. Pitman & Sons, ltd., 1920.