Não informado. (2008). Tsukuba Geoenvironmental Sciences. University of Tsukuba, Doctoral Program in Geoenvironmental Sciences.
Chicago-referens (17:e uppl.)Não informado. Tsukuba Geoenvironmental Sciences. Tsukuba, Japão: University of Tsukuba, Doctoral Program in Geoenvironmental Sciences, 2008.
MLA-referens (8:e uppl.)Não informado. Tsukuba Geoenvironmental Sciences. University of Tsukuba, Doctoral Program in Geoenvironmental Sciences, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.