APA引文

J.Berman Saul. (2011). Not for Free: Revenue Strategies for a New World. American: Harvard Business Review Book.

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.