APA (7th ed.) Citation

Nix, G. (2001). The seventh tower: The violet keystone, book six. Scholastic Inc.

Chicago Style (17th ed.) Citation

Nix, Garth. The Seventh Tower: The Violet Keystone, Book Six. New York: Scholastic Inc, 2001.

MLA (9th ed.) Citation

Nix, Garth. The Seventh Tower: The Violet Keystone, Book Six. Scholastic Inc, 2001.

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