APA引文

Penfield, P. (2010). A Primer on Negotiating Corporate Purchase Contracts. Business Expert Press.

Trích dẫn kiểu Chicago

Penfield, Patrick. A Primer On Negotiating Corporate Purchase Contracts. Business Expert Press, 2010.

MLA引文

Penfield, Patrick. A Primer On Negotiating Corporate Purchase Contracts. Business Expert Press, 2010.

警告：這些引文格式不一定是100％准確.