APA Zitierstil

Sivertsen, B., Hysing, M., Elgen, I., Stormark, K. M., & Lundervold, A. J. (2009). Chronicity of sleep problems in children with chronic illness: A longitudinal population-based study. BioMed Central.

Chicago Zitierstil

Sivertsen, Børge, Mari Hysing, Irene Elgen, Kjell Morten Stormark, und Astri J. Lundervold. Chronicity of Sleep Problems in Children With Chronic Illness: A Longitudinal Population-based Study. BioMed Central, 2009.

MLA Zitierstil

Sivertsen, Børge, et al. Chronicity of Sleep Problems in Children With Chronic Illness: A Longitudinal Population-based Study. BioMed Central, 2009.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.