APA (7th ed.) Citation

Bellairs, J. (2004). The spell of the sorcerer's skull. Puffin Books.

Chicago Style (17th ed.) Citation

Bellairs, John. The Spell of the Sorcerer's Skull. New York: Puffin Books, 2004.

MLA (8th ed.) Citation

Bellairs, John. The Spell of the Sorcerer's Skull. Puffin Books, 2004.

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