Não informado. (1989). Agroforestry Today. International Centre for Research in Agroforestry.
Chicago-referens (17:e uppl.)Não informado. Agroforestry Today. Nairobi: International Centre for Research in Agroforestry, 1989.
MLA-referens (8:e uppl.)Não informado. Agroforestry Today. International Centre for Research in Agroforestry, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.