Kavalsky, B. (1978). Portugal. The World Bank.
Chicago Style aipamenaKavalsky, Basil. Portugal. The World Bank, 1978.
MLA aipamenaKavalsky, Basil. Portugal. The World Bank, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
Kavalsky, B. (1978). Portugal. The World Bank.
Chicago Style aipamenaKavalsky, Basil. Portugal. The World Bank, 1978.
MLA aipamenaKavalsky, Basil. Portugal. The World Bank, 1978.