Lua APA (7ú heag.)

Berman Saul J. (2011). Not For Free: Revenue Strategies for a new world. Harvard Business Review Press.

Lua i Stíl Chicago (17ú heag.)

Berman Saul J. Not For Free: Revenue Strategies for a New World. Boston: Harvard Business Review Press, 2011.

Lua MLA (9ú heag.)

Berman Saul J. Not For Free: Revenue Strategies for a New World. Harvard Business Review Press, 2011.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.