Cita APA

Estévez, M., Juan Mainar, R., Ruiz Alares, M. C., & Andrés Gimeno, J. M. (1990). Formation of humic acids in lignites and subbituminous coals by dry air oxidation.

Citación estilo Chicago

Estévez, Mercedes, Roberto Juan Mainar, M. Carmen Ruiz Alares, y José Manuel Andrés Gimeno. Formation of Humic Acids in Lignites and Subbituminous Coals By Dry Air Oxidation. 1990.

Cita MLA

Estévez, Mercedes, Roberto Juan Mainar, M. Carmen Ruiz Alares, y José Manuel Andrés Gimeno. Formation of Humic Acids in Lignites and Subbituminous Coals By Dry Air Oxidation. 1990.