APA aipamena

Guell, R. C. (2003). Issues in economics today. McGraw-hill.

Chicago Style aipamena

Guell, Robert C. Issues in Economics Today. McGraw-hill, 2003.

MLA aipamena

Guell, Robert C. Issues in Economics Today. McGraw-hill, 2003.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.