Não informado. (2000). University of Toronto biological series. University of Toronto Press.
Chicago-referens (17:e uppl.)Não informado. University of Toronto Biological Series. Toronto, Canada: University of Toronto Press, 2000.
MLA-referens (8:e uppl.)Não informado. University of Toronto Biological Series. University of Toronto Press, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.
