General anesthesia alters time perception by phase shifting the circadian clock.

MLA

Cheeseman, James F., et al. “General Anesthesia Alters Time Perception by Phase Shifting the Circadian Clock.” Proceedings of the National Academy of Sciences of the United States of America, vol. 109, no. 18, May 2012, pp. 7061–66. EBSCOhost, https://doi.org/10.1073/pnas.1201734109.

APA

Cheeseman, J. F., Winnebeck, E. C., Millar, C. D., Kirkland, L. S., Sleigh, J., Goodwin, M., Pawley, M. D. M., Bloch, G., Lehmann, K., Menzel, R., & Warman, G. R. (2012). General anesthesia alters time perception by phase shifting the circadian clock. Proceedings of the National Academy of Sciences of the United States of America, 109(18), 7061–7066. https://doi.org/10.1073/pnas.1201734109

Chicago

Cheeseman, James F., Eva C. Winnebeck, Craig D. Millar, Lisa S. Kirkland, James Sleigh, Mark Goodwin, Matt D. M. Pawley, et al. 2012. “General Anesthesia Alters Time Perception by Phase Shifting the Circadian Clock.” Proceedings of the National Academy of Sciences of the United States of America 109 (18): 7061–66. doi:10.1073/pnas.1201734109.