APA (7th ed.) Citation

Gardner, E. S. (1943). The case of the dangerous dowager. Triangle Books.

Chicago Style (17th ed.) Citation

Gardner, Erle Stanley. The Case of the Dangerous Dowager. New York: Triangle Books, 1943.

MLA (9th ed.) Citation

Gardner, Erle Stanley. The Case of the Dangerous Dowager. Triangle Books, 1943.