APA (7th ed.) Zitazioa
Caulfield, N. (2010). NAFTA and labor in North America. University of Illinois Press.
Chicago Style (17th ed.) Zitazioa
Caulfield, Norman. NAFTA and Labor in North America. Urbana: University of Illinois Press, 2010.
MLA (9th ed.) Zitazioa
Caulfield, Norman. NAFTA and Labor in North America. University of Illinois Press, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.