Misteri Umur Berakhirkan Angka 9

The last but not least, jalani hidup, lakukan evaluasi, dan dilarang bunuh diri!

Salam Hangat

Sumber: 

1. Alter dan Hershfield/People search for meaning when they approach a new decade in chronological age

2. Daniel Pink/ When: The Scientific Secrets of Perfect Timing Kindle Edition

3. Alter dan Hershfield/The End-Of-Decade Effect