The economist: Sep-Dec 2017.
Chicago Style aipamenaThe Economist: Sep-Dec 2017.
MLA aipamenaThe Economist: Sep-Dec 2017.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
The economist: Sep-Dec 2017.
Chicago Style aipamenaThe Economist: Sep-Dec 2017.
MLA aipamenaThe Economist: Sep-Dec 2017.