Smith, D. (2003). Free liunch: Easily digestable economics, served on plate.
Chicago Style aipamenaSmith, David. Free Liunch: Easily Digestable Economics, Served on Plate. London, 2003.
MLA aipamenaSmith, David. Free Liunch: Easily Digestable Economics, Served on Plate. 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.