APA (7th ed.) Citation

Luce, C. B. (1940). Europe in the spring. A.A. Knopf.

Chicago Style (17th ed.) Citation

Luce, Clare Boothe. Europe in the Spring. New York: A.A. Knopf, 1940.

MLA (9th ed.) Citation

Luce, Clare Boothe. Europe in the Spring. A.A. Knopf, 1940.