Não informado. (2018). Report. Ohio State University, Institute of Polar Studies.
Chicago-viite (17. p.)Não informado. Report. Columbus, Ohio: Ohio State University, Institute of Polar Studies, 2018.
MLA-viite (8. p.)Não informado. Report. Ohio State University, Institute of Polar Studies, 2018.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.