APA (7th ed.) Citation

Barton, A. W. (1939). A text book on light. Longmans, Green and co..

Chicago Style (17th ed.) Citation

Barton, A. W. A Text Book on Light. London, New York [etc.]: Longmans, Green and co., 1939.

MLA (9th ed.) Citation

Barton, A. W. A Text Book on Light. Longmans, Green and co., 1939.