APA (7th ed.) Citation

Porter, D., & Prince, D. (2010). Frommer's London 2011. Wiley.

Chicago Style (17th ed.) Citation

Porter, Darwin, and Danforth Prince. Frommer's London 2011. Hoboken, N.J: Wiley, 2010.

MLA (9th ed.) Citation

Porter, Darwin, and Danforth Prince. Frommer's London 2011. Wiley, 2010.