Não informado. (1912). Bulletin of the Department of Agriculture, Ceylon. Department of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the Department of Agriculture, Ceylon. Colombo: Department of Agriculture, 1912.
MLA-referens (8:e uppl.)Não informado. Bulletin of the Department of Agriculture, Ceylon. Department of Agriculture, 1912.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.