Cita APA (7a ed.)
Olk, D., Cassman, K., & Fan, T. (1995). Characterization of 2 humic-acid fractions from a calcareous vermiculitic soil - implications for the humification process. Elsevier.
Cita Chicago Style (17a ed.)
Olk, D.C, K.G Cassman, y T.W.M Fan. Characterization of 2 Humic-acid Fractions from a Calcareous Vermiculitic Soil - Implications for the Humification Process. Elsevier, 1995.
Cita MLA (9a ed.)
Olk, D.C, et al. Characterization of 2 Humic-acid Fractions from a Calcareous Vermiculitic Soil - Implications for the Humification Process. Elsevier, 1995.
Precaución: Estas citas no son 100% exactas.