Media type: E-Article Title: Sedentary behaviour and sleep problems among young, middle-aged, and older persons in South Africa: A brief report Contributor: Peltzer, Karl; Pengpid, Supa imprint: Informa UK Limited, 2019 Published in: Journal of Psychology in Africa Language: English DOI: 10.1080/14330237.2019.1647959 ISSN: 1433-0237; 1815-5626 Keywords: General Psychology Origination: Footnote: