Não informado. (1996). Nutrient Cycling in Agroecosystems. Kluwer Academic Publishers.
Chicago-viite (17. p.)Não informado. Nutrient Cycling in Agroecosystems. Dordrecht, Holanda: Kluwer Academic Publishers, 1996.
MLA-viite (8. p.)Não informado. Nutrient Cycling in Agroecosystems. Kluwer Academic Publishers, 1996.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.