APA aipamena

World bank. (2013). World development indicators. 2013. World bank.

Chicago Style aipamena

World bank. World Development Indicators. 2013. World bank, 2013.

MLA aipamena

World bank. World Development Indicators. 2013. World bank, 2013.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.