APA (7th ed.) Citation

De Angeli, M. (1949). The door in the wall. Yearling Books.

Chicago Style (17th ed.) Citation

De Angeli, Marguerite. The Door in the Wall. New York: Yearling Books, 1949.

MLA (9th ed.) Citation

De Angeli, Marguerite. The Door in the Wall. Yearling Books, 1949.