United States Board on Geographic Names/Permanent Committee on Geographical Names for British Official Use. "Romanization System for AmharicArkivigite je 2013-02-13 per la retarkivo Wayback Machine". 1967. Ĉe National Geospatial Intelligence Agency, 2013. Alirita la 28a Feb 2014.
United States Board on Geographic Names/Permanent Committee on Geographical Names for British Official Use. "Romanization System for AmharicArkivigite je 2013-02-13 per la retarkivo Wayback Machine". 1967. Ĉe National Geospatial Intelligence Agency, 2013. Alirita la 28a Feb 2014.