APA (7th ed.) Citation

Gardner, E. S. (1959). The count of nine. Heinemann.

Chicago Style (17th ed.) Citation

Gardner, Erle Stanley. The Count of Nine. London: Heinemann, 1959.

MLA (8th ed.) Citation

Gardner, Erle Stanley. The Count of Nine. Heinemann, 1959.

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