#Proof of Authentication
Blog and Articles
1. https://www.facebook.com/groups/116855132359491/permalink/203999306978406/
2. https://steemit.com/ico/@kalong1/umc-the-marketing-revolution-in-messengers
3. https://www.minds.com/kalong/blog/umc-cuc-cch-mng-tip-th-trong-s-gi-881888755980926976
4. https://www.linkedin.com/pulse/introduction-universal-marketing-company-umc-ka-long/
5. http://hoangdubai.blogspot.com/2018/08/gioi-thieu-ve-cong-ty-tiep-thi-toan-cau.html
6. https://t.me/bountyico68/1368