Eertwegh, G. A. P. H. v. d. (2002). Water and nutrient budgets at field and regional scale: Travel times of drainage water and nutrient loads to surface water. s.n..
Chicago-referens (17:e uppl.)Eertwegh, G. A. P. H. van den. Water and Nutrient Budgets at Field and Regional Scale: Travel Times of Drainage Water and Nutrient Loads to Surface Water. [Wageningen: s.n., 2002.
MLA-referens (8:e uppl.)Eertwegh, G. A. P. H. van den. Water and Nutrient Budgets at Field and Regional Scale: Travel Times of Drainage Water and Nutrient Loads to Surface Water. s.n., 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.