APA (7th ed.) Citation

Queen, E. (1970). The black hearts murder. Magnum Books.

Chicago Style (17th ed.) Citation

Queen, Ellery. The Black Hearts Murder. New York: Magnum Books, 1970.

MLA (9th ed.) Citation

Queen, Ellery. The Black Hearts Murder. Magnum Books, 1970.

Warning: These citations may not always be 100% accurate.