APA (7th ed.) Citation

Langer, W. L. (1971). The revolutions of 1848. Harper & Row.

Chicago Style (17th ed.) Citation

Langer, William L. The Revolutions of 1848. New York,: Harper & Row, 1971.

MLA (8th ed.) Citation

Langer, William L. The Revolutions of 1848. Harper & Row, 1971.