Não informado. (1881). Tropical agriculturist. Ceylon Agricultural Society, Department of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Tropical Agriculturist. Peradeniya, Sri Lanka: Ceylon Agricultural Society, Department of Agriculture, 1881.
MLA-referens (8:e uppl.)Não informado. Tropical Agriculturist. Ceylon Agricultural Society, Department of Agriculture, 1881.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.