O'DONNELL, D., SILVA, E. J., MÜNCH, M., RONDA, J. M., WANG, W., & DUFFY, J. F. (2009). Comparison of subjective and objective assessments of sleep in healthy older subjects without sleep complaints. Journal of sleep research, 18(2), 254-263. https://doi.org/10.1111/j.1365-2869.2008.00719.x
Chicago Style (17th ed.) CitationO'DONNELL, DEIRDRE, EDWARD J. SILVA, MIRJAM MÜNCH, JOSEPH M. RONDA, WEI WANG, and JEANNE F. DUFFY. "Comparison of Subjective and Objective Assessments of Sleep in Healthy Older Subjects Without Sleep Complaints." Journal of Sleep Research 18, no. 2 (2009): 254-263. https://doi.org/10.1111/j.1365-2869.2008.00719.x.
MLA (9th ed.) CitationO'DONNELL, DEIRDRE, et al. "Comparison of Subjective and Objective Assessments of Sleep in Healthy Older Subjects Without Sleep Complaints." Journal of Sleep Research, vol. 18, no. 2, 2009, pp. 254-263, https://doi.org/10.1111/j.1365-2869.2008.00719.x.