Creative Commons Attribution 4.0

Description 

Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material for any purpose, even commercially.

The licensor cannot revoke these freedoms as long as you follow the license terms.

Requirement 
A. identification of the creator(s)
a copyright notice
a notice that refers to this Public License
a notice that refers to the disclaimer of warranties
a URI or hyperlink to the Licensed Material to the extent reasonably practicable
B. indicate if You modified the Licensed Material and retain an indication of any previous modifications
C. indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License
Legal Code 
Attribution — You must give appropriate credit, provide a link to the license, and indicate if chang
Additional Permissions 
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation. No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.
Reference URL 
https://creativecommons.org/licenses/by/4.0/