Não informado. (1971). ADAS Quarterly Review. Agricultural Development and Advisory Service.
Chicago-referens (17:e uppl.)Não informado. ADAS Quarterly Review. London: Agricultural Development and Advisory Service, 1971.
MLA-referens (8:e uppl.)Não informado. ADAS Quarterly Review. Agricultural Development and Advisory Service, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.