APA引文

 Guell, R. C. (2010).  Issues in economics today.  McGraw-Hill/Irwin.

Trích dẫn kiểu Chicago

 Guell, Robert C.  Issues in Economics Today.  McGraw-Hill/Irwin, 2010.

MLA引文

 Guell, Robert C.  Issues in Economics Today.  McGraw-Hill/Irwin, 2010.

警告：這些引文格式不一定是100％准確.