1. http://oursolving.blogspot.com/
2. https://siswaberkaizen.wordpress.com/
3. https://noblegrey.net/
4. https://achmadruky.com/
5. http://hr4free.com
6. https://www.staffone.com
7. https://ilmusdm.wordpress.com/
8. https://www.staffing.org/Library.aspx
9. https://www.onetcenter.org/
10. http://www.agilitypath.com.au/articles
11. https://medium.com/@jpartogi
12. https://www.personneltoday.com
13. https://empxtrack.com/