APA (7th ed.) Citation

Lewis, C. S. (2001). The silver chair, book 6. HarperCollins Children's Books.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Silver Chair, Book 6. New York: HarperCollins Children's Books, 2001.

MLA (9th ed.) Citation

Lewis, C. S. The Silver Chair, Book 6. HarperCollins Children's Books, 2001.

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