Jones, «In U.S., 40 % Get Less Than Recommended Amount of Sleep.»
28
Sleepless in America, directed by John Hoffman (Washington, D.C.: National Geographic Channel, 2014), Television Documentary.
29
«GO! to Sleep,» Cleveland Clinic Wellness, .
30
«Annual Sleep in America Poll Exploring Connections with Communications Technology Use and Sleep,» National Sleep Foundation press release, March 7, 2011, http://www.sleepfoundation.org.
