Παραπομπή APA

Berman, S. J. (2011). Not for free: Making money in the digital age. Boston, Mass: Harvard Business Review Press.

Παραπομπή Chicago Style

Berman, Saul Jay. Not for Free: Making Money in the Digital Age. Boston, Mass: Harvard Business Review Press, 2011.

Παραπομπή MLA

Berman, Saul Jay. Not for Free: Making Money in the Digital Age. Boston, Mass: Harvard Business Review Press, 2011.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.