APA (7th ed.) Citation

Keynes, J. M. (1951). Essays in biography (New ed.). Norton.

Chicago Style (17th ed.) Citation

Keynes, John Maynard. Essays in Biography. New ed. New York: Norton, 1951.

MLA (9th ed.) Citation

Keynes, John Maynard. Essays in Biography. New ed. Norton, 1951.