APA

Sigmon S. C., Herning R. I., Better W., Cadet J. L. & Griffiths R. R. (20090731). Caffeine withdrawal, acute effects, tolerance, and absence of net beneficial effects of chronic administration: cerebral blood flow velocity, quantitative EEG, and subjective effects. : Psychopharmacology.

Chicago

Sigmon Stacey C, Herning Ronald I, Better Warren, Cadet Jean L and Griffiths Roland R. 20090731. Caffeine withdrawal, acute effects, tolerance, and absence of net beneficial effects of chronic administration: cerebral blood flow velocity, quantitative EEG, and subjective effects. : Psychopharmacology.

Harvard

Sigmon S. C., Herning R. I., Better W., Cadet J. L. and Griffiths R. R. (20090731). Caffeine withdrawal, acute effects, tolerance, and absence of net beneficial effects of chronic administration: cerebral blood flow velocity, quantitative EEG, and subjective effects. : Psychopharmacology.

MLA

Sigmon Stacey C, Herning Ronald I, Better Warren, Cadet Jean L and Griffiths Roland R. Caffeine withdrawal, acute effects, tolerance, and absence of net beneficial effects of chronic administration: cerebral blood flow velocity, quantitative EEG, and subjective effects. : Psychopharmacology. 20090731.