Cita APA (7a ed.)
Westerhof, R., Silva, J. d., Ayarza, M. A., & Zech, W. (1999). Phosphorus fractions under different land-use systems in oxisols of the Brazilian cerrados. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Westerhof, R., J.E. da Silva, Miguel Angel Ayarza, y W. Zech. Phosphorus Fractions Under Different Land-use Systems in Oxisols of the Brazilian Cerrados. International Center for Tropical Agriculture, 1999.
Cita MLA (9a ed.)
Westerhof, R., et al. Phosphorus Fractions Under Different Land-use Systems in Oxisols of the Brazilian Cerrados. International Center for Tropical Agriculture, 1999.
Precaución: Estas citas no son 100% exactas.