APA (7th ed.) Citation

Deighton, J., & Kornfeld, L. (2013). Amazon, Apple, Facebook, and Google (Revised: December 12, 2013.). Harvard Business School Publishing.

Chicago Style (17th ed.) Citation

Deighton, John, and Leonora Kornfeld. Amazon, Apple, Facebook, and Google. Revised: December 12, 2013. Boston: Harvard Business School Publishing, 2013.

MLA (9th ed.) Citation

Deighton, John, and Leonora Kornfeld. Amazon, Apple, Facebook, and Google. Revised: December 12, 2013. Harvard Business School Publishing, 2013.