APA (7th ed.) Citation

Blacke, O. (2026). The Key to a Killer: A Ruby and Cordelia Mystery. Minotaur Books.

Chicago Style (17th ed.) Citation

Blacke, Olivia. The Key to a Killer: A Ruby and Cordelia Mystery. Minotaur Books, 2026.

MLA (8th ed.) Citation

Blacke, Olivia. The Key to a Killer: A Ruby and Cordelia Mystery. Minotaur Books, 2026.

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