Gaya APA

Lee, J, W. et al (2012). Hydrothermal preparation of nitrogen-doped graphene sheets via hexamethylenetetramine for application as supercapacitor electrodes . New York: Elsevier Ltd..

Gaya MLA

Lee, Jeong, Woo. et al. "Hydrothermal preparation of nitrogen-doped graphene sheets via hexamethylenetetramine for application as supercapacitor electrodes". New York: Elsevier Ltd., 2012. e-journal.