APA (7th ed.) Citation

Fellowes, J., Briggs, N., & Fellowes, J. (2011). The world of Downton Abbey (First U.S. edition.). St. Martin's Press.

Chicago Style (17th ed.) Citation

Fellowes, Jessica, Nick Briggs, and Julian Fellowes. The World of Downton Abbey. First U.S. edition. New York: St. Martin's Press, 2011.

MLA (8th ed.) Citation

Fellowes, Jessica, et al. The World of Downton Abbey. First U.S. edition. St. Martin's Press, 2011.