European Credit Transfer and Accumulation System . EKI terminibaas Esterm. Институт эстонского языка, Сынавееб 2026. https://sonaveeb.ee/search/unif//esterm/European%20Credit%20Transfer%20and%20Accumulation%20System/1/eng (19.06.2026)
European Credit Transfer and Accumulation System . Haridussõnastik. Институт эстонского языка, Сынавееб 2026. https://sonaveeb.ee/search/unif//har/European%20Credit%20Transfer%20and%20Accumulation%20System/1/eng (19.06.2026)