Aon Hewitt. (2012). Making Employee Engagement Happen: Best Practices from Best Employers, http://www.aon.com/human-capital-consulting/thought-leadershiptalent_mgmt2012_Making_Employee_Engagement_Happen_Best_Practices_Best_Employers_White_Paper.jsp.
Aon Hewitt. (2011). Trends in Global Employee Engagement, http://www.aon.com/attachments/thought-eadership/Trends_Global_Employee_Engagement_Final.pdf.
Harter, Jim. (2012). Mondays Not So “Blue” for Engaged Employees. Gallup, http://www/gallup.com/poll/155924/Mondays-Not-Blue-Engaged-Employees.aspx.
Hewitt Associates. (2010). Employee Engagement in Turbulent Times: How Other Organizations Are Performing. www.hewitt.com.
Thomas, K.W. (2009). Intrinsic Motivation at Work: What Really Drives Employee Engagement, 2nd edition. San Francisco, CA: Berrett-Koehler Publishers, Inc.
Towers Watson. (2012). 2012 Global Workforce Study, Engagement At Risk: Driving Strong Performance in a Volatile Global Environment, www.towerswatson.com.
World at Work. (2011). Total Rewards Model: A Framework for Strategies to Attract, Motivate and Retain Employees, http://www.worldatwork.org/waw/adimLink?id=28330.