APA-referens

United Nations Economic Commission for Europe. (1983). Efficient use of fertilizers in agriculture. New York: The United Nations.

Chicago-stil citat

United Nations Economic Commission for Europe. Efficient Use of Fertilizers in Agriculture. New York: The United Nations, 1983.

MLA-referens

United Nations Economic Commission for Europe. Efficient Use of Fertilizers in Agriculture. New York: The United Nations, 1983.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.