APA (7th ed.) Citation

Queen, E. (1969). The Roman hat mystery: A problem in deduction. V. Gollancz.

Chicago Style (17th ed.) Citation

Queen, Ellery. The Roman Hat Mystery: A Problem in Deduction. London: V. Gollancz, 1969.

MLA (8th ed.) Citation

Queen, Ellery. The Roman Hat Mystery: A Problem in Deduction. V. Gollancz, 1969.

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