Berman, S. J. (2011). Not for free: Making money in the digital age. Boston, Mass: Harvard Business Review Press.
シカゴスタイル引用形Berman, Saul Jay. Not for Free: Making Money in the Digital Age. Boston, Mass: Harvard Business Review Press, 2011.
MLA引用形式Berman, Saul Jay. Not for Free: Making Money in the Digital Age. Boston, Mass: Harvard Business Review Press, 2011.
警告: この引用は必ずしも正確ではありません.