APA-referens

(1982). Nitrogen in agricultural soils. Wisconsin, USA: American Society of Agronomy, Inc.

Chicago-stil citat

Nitrogen in Agricultural Soils. Wisconsin, USA: American Society of Agronomy, Inc, 1982.

MLA-referens

Nitrogen in Agricultural Soils. Wisconsin, USA: American Society of Agronomy, Inc, 1982.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.