Não informado. (2020). Crop Science, Soil Science, Agronomy News. American Society of Agronomy.
Chicago-referens (17:e uppl.)Não informado. Crop Science, Soil Science, Agronomy News. Madison, Wis: American Society of Agronomy, 2020.
MLA-referens (8:e uppl.)Não informado. Crop Science, Soil Science, Agronomy News. American Society of Agronomy, 2020.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.