Gallup, Inc., State of the Global Workplace: Employee Engagement Insights for Business Leaders Worldwide, gallup.com, 2013 г.
115
Тот же источник.
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David MacLeod and Nita Clarke, ‘Engaging for Success: Enhancing Performance Through Employee Engagement, A Report to Government', Department for Business, Innovation & Skills, bis.gov.uk, 2011 г.
