APA (7th ed.) Citation

Wivstad, M. (1997). Green-manure crops as a source of nitrogen in cropping systems. Swedish Univ. of Agricultural Sciences, Dep. of Crop Production Science.

Chicago Style (17th ed.) Citation

Wivstad, Maria. Green-manure Crops as a Source of Nitrogen in Cropping Systems. Uppsala: Swedish Univ. of Agricultural Sciences, Dep. of Crop Production Science, 1997.

MLA (9th ed.) Citation

Wivstad, Maria. Green-manure Crops as a Source of Nitrogen in Cropping Systems. Swedish Univ. of Agricultural Sciences, Dep. of Crop Production Science, 1997.