APA (7th ed.) Citation

ScienceDirect (Online service), Kerkhof, G. A., & Van Dongen, H. P. A. (2011). Human sleep and cognition. Elsevier.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), G. A. Kerkhof, and Hans P. A. Van Dongen. Human Sleep and Cognition. Amsterdam: Elsevier, 2011.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Human Sleep and Cognition. Elsevier, 2011.