APA (7th ed.) Citation

Gemmell, D. (1997). The last guardian: The stones of power book four. Ballantine Books.

Chicago Style (17th ed.) Citation

Gemmell, David. The Last Guardian: The Stones of Power Book Four. New York: Ballantine Books, 1997.

MLA (8th ed.) Citation

Gemmell, David. The Last Guardian: The Stones of Power Book Four. Ballantine Books, 1997.