APA (7th ed.) Citation

ScienceDirect (Online service), Stefan, H., & Theodore, W. H. (2012). Epilepsy. Elsevier.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Hermann Stefan, and William H. Theodore. Epilepsy. Amsterdam: Elsevier, 2012.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Epilepsy. Elsevier, 2012.