APA (7th ed.) Citation

Shippey, T. A. (2001). J.R.R. Tolkien: Author of the century. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Shippey, T. A. J.R.R. Tolkien: Author of the Century. Boston: Houghton Mifflin, 2001.

MLA (8th ed.) Citation

Shippey, T. A. J.R.R. Tolkien: Author of the Century. Houghton Mifflin, 2001.