APA (7th ed.) Citation

Post, M. D. The Sleuth of St. James's Square.

Chicago Style (17th ed.) Citation

Post, Melville Davisson. The Sleuth of St. James's Square.

MLA (9th ed.) Citation

Post, Melville Davisson. The Sleuth of St. James's Square.

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