Citação norma APA

Río Andrade, J. C. d., González-Vila, F. J., Martín Martínez, F., & Verdejo Robles, T. (1994). Characterization of humic acids from low-rank coals by 13C-NMR and pyrolysis-methylation. Formation of benzenecarboxylic acid moieties during the coalification process.

Citação norma Chicago

Río Andrade, José Carlos del, Francisco Javier González-Vila, Francisco Martín Martínez, y Trinidad Verdejo Robles. Characterization of Humic Acids From Low-rank Coals By 13C-NMR and Pyrolysis-methylation. Formation of Benzenecarboxylic Acid Moieties During the Coalification Process. 1994.

Citação norma MLA

Río Andrade, José Carlos del, Francisco Javier González-Vila, Francisco Martín Martínez, y Trinidad Verdejo Robles. Characterization of Humic Acids From Low-rank Coals By 13C-NMR and Pyrolysis-methylation. Formation of Benzenecarboxylic Acid Moieties During the Coalification Process. 1994.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.