APA (7th ed.) Citation

Ruditis. (2003). Where in the world is Sabrina Spellman? Pocket Book.

Chicago Style (17th ed.) Citation

Ruditis. Where in the World Is Sabrina Spellman? London: Pocket Book, 2003.

MLA (8th ed.) Citation

Ruditis. Where in the World Is Sabrina Spellman? Pocket Book, 2003.