Cita APA (7a ed.)
Schulthess, U. C., Feil, B., & Jutzi, S. (1997). Yield-independent variation in grain nitrogen and phosphorus concentration among Ethiopian wheats.
Cita Chicago Style (17a ed.)
Schulthess, Urs C., B. Feil, y S.C Jutzi. Yield-independent Variation in Grain Nitrogen and Phosphorus Concentration Among Ethiopian Wheats. 1997.
Cita MLA (9a ed.)
Schulthess, Urs C., et al. Yield-independent Variation in Grain Nitrogen and Phosphorus Concentration Among Ethiopian Wheats. 1997.
Precaución: Estas citas no son 100% exactas.