APA (7th ed.) Citation

ScienceDirect (Online service), Young, G. B., & Wijdicks, E. F. M. (2008). Disorders of consciousness. Elsevier.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), G. Bryan Young, and Eelco F. M. Wijdicks. Disorders of Consciousness. Amsterdam: Elsevier, 2008.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Disorders of Consciousness. Elsevier, 2008.