APA (7th ed.) Citation

Klingberg, F. J. (1943). Main currents in English history. D. Appleton-Century.

Chicago Style (17th ed.) Citation

Klingberg, Frank J. Main Currents in English History. New York, London: D. Appleton-Century, 1943.

MLA (9th ed.) Citation

Klingberg, Frank J. Main Currents in English History. D. Appleton-Century, 1943.