APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.