Não informado. Report on the Botanic Gardens and Their Work. Department of Science and Agriculture.
Chicago-referens (17:e uppl.)Não informado. Report on the Botanic Gardens and Their Work. Georgetown: Department of Science and Agriculture.
MLA-referens (8:e uppl.)Não informado. Report on the Botanic Gardens and Their Work. Department of Science and Agriculture.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.