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Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (8ú heag.)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.
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