APA (7th ed.) Citation

Keene,Carolyn. The Sinister Omen. Armada.

Chicago Style (17th ed.) Citation

Keene,Carolyn. The Sinister Omen. London: Armada.

MLA (9th ed.) Citation

Keene,Carolyn. The Sinister Omen. Armada.

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