Gaya APA

Berman, Saul J.. (2011). Not for free : revenue strategies for a new world . Boston: Harvard Business Review Press.

Gaya Chicago

Berman, Saul J.. Not for free : revenue strategies for a new world. Boston: Harvard Business Review Press, 2011. Text.

Gaya MLA

Berman, Saul J.. Not for free : revenue strategies for a new world. Boston: Harvard Business Review Press, 2011. Text.

Gaya Turabian

Berman, Saul J.. Not for free : revenue strategies for a new world. Boston: Harvard Business Review Press, 2011. Print.