UNECE. (2017). Inventory of main standards and parameters of the E waterway network: Blue book. United nations.
Чикаго маягийн жагсаалтUNECE. Inventory of Main Standards and Parameters of the E Waterway Network: Blue Book. New York: United nations, 2017.
MLA ишлэлUNECE. Inventory of Main Standards and Parameters of the E Waterway Network: Blue Book. United nations, 2017.
Warning: These citations may not always be 100% accurate.