Cita APA (7a ed.)
Westerhof, R., Vilela, L., Ayarza, M. A., & Zech, W. (1999). Characterization labile and stable nitrogen. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Westerhof, R., Lourival Vilela, Miguel Angel Ayarza, y W. Zech. Characterization Labile and Stable Nitrogen. International Center for Tropical Agriculture, 1999.
Cita MLA (9a ed.)
Westerhof, R., et al. Characterization Labile and Stable Nitrogen. International Center for Tropical Agriculture, 1999.
Precaución: Estas citas no son 100% exactas.