APA
Hagel J. &. A. A. G., . (1997). Net gain : expanding markets through virtual communities. Harvard Business School Press, Boston: .
Chicago
Hagel John & Armstrong Arthur G, . 1997. Net gain : expanding markets through virtual communities. Harvard Business School Press, Boston: .
Harvard
Hagel J. &. A. A. G., . (1997). Net gain : expanding markets through virtual communities. Harvard Business School Press, Boston: .
MLA
Hagel John & Armstrong Arthur G, . Net gain : expanding markets through virtual communities. Harvard Business School Press, Boston: . 1997.