Não informado. (1960). Conservationist. New York State Department of Environmental Conservation.
Chicago-referens (17:e uppl.)Não informado. Conservationist. Albany, NY: New York State Department of Environmental Conservation, 1960.
MLA-referens (8:e uppl.)Não informado. Conservationist. New York State Department of Environmental Conservation, 1960.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.