Não informado. (2004). Journal of Agriculture and Environment for International Development. Istituto Agronomico per l' Otremare.
Chicago-referens (17:e uppl.)Não informado. Journal of Agriculture and Environment for International Development. Florence, Italia: Istituto Agronomico per l' Otremare, 2004.
MLA-referens (8:e uppl.)Não informado. Journal of Agriculture and Environment for International Development. Istituto Agronomico per l' Otremare, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.