Παραπομπή σε μορφή APA (7η εκδ.)

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..

Παραπομπή σε μορφή Chicago (17η εκδ.)

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.

Παραπομπή σε μορφή MLA (8th εκδ.)

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.