APA (7th ed.) Citation

Christie. (1994). By the pricking of my thumbs. Harper Collin Publisher.

Chicago Style (17th ed.) Citation

Christie. By the Pricking of My Thumbs. London: Harper Collin Publisher, 1994.

MLA (9th ed.) Citation

Christie. By the Pricking of My Thumbs. Harper Collin Publisher, 1994.

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