Não informado. (1986). American Journal of Alternative Agriculture. Institute for Alternative Agriculture.
Chicago-referens (17:e uppl.)Não informado. American Journal of Alternative Agriculture. Greenbelt, Md: Institute for Alternative Agriculture, 1986.
MLA-referens (8:e uppl.)Não informado. American Journal of Alternative Agriculture. Institute for Alternative Agriculture, 1986.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.