APA (7th ed.) Citation

Lingard, J. (2005). The sign of the black dagger. Puffin Books.

Chicago Style (17th ed.) Citation

Lingard, Joan. The Sign of the Black Dagger. London: Puffin Books, 2005.

MLA (9th ed.) Citation

Lingard, Joan. The Sign of the Black Dagger. Puffin Books, 2005.