Não informado. (2021). The Unesco Courier. United Nations Educational, Scientific and Cultural Organization (Unesco).
Chicago-viite (17. p.)Não informado. The Unesco Courier. Paris: United Nations Educational, Scientific and Cultural Organization (Unesco), 2021.
MLA-viite (8. p.)Não informado. The Unesco Courier. United Nations Educational, Scientific and Cultural Organization (Unesco), 2021.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.