Sádaba-Chalezquer, Charo. “John HAGEL III Y Arthur G. ARMSTRONG. Net Gain. Expanding Markets through Virtual Communities. Harvard Business School Press, 1997, 239 Pp.”. Communication & Society 11, no. 1 (January 1, 1998). Accessed May 7, 2024. https://revistas.unav.edu/index.php/communication-and-society/article/view/36426.