Cita APA (7th ed.)

Burstein, D., & De Keijzer, A. J. (2005). Secrets of Angels & Demons: The unauthorized guide to the bestselling novel. Orion Books.

Cita Chicago (17th ed.)

Burstein, Daniel, i Arne J. De Keijzer. Secrets of Angels & Demons: The Unauthorized Guide to the Bestselling Novel. London: Orion Books, 2005.

Cita MLA (9th ed.)

Burstein, Daniel, i Arne J. De Keijzer. Secrets of Angels & Demons: The Unauthorized Guide to the Bestselling Novel. Orion Books, 2005.