APA citiranje

Jan Verhagen. (1997). Spatial soil variability as a guiding principle in nitrogen management. The Netherland: Wageningen University.

Trích dẫn kiểu Chicago

Jan Verhagen. Spatial Soil Variability As a Guiding Principle in Nitrogen Management. The Netherland: Wageningen University, 1997.

MLA citiranje

Jan Verhagen. Spatial Soil Variability As a Guiding Principle in Nitrogen Management. The Netherland: Wageningen University, 1997.