How to indicate the proprietarity of software in my code

[web_craftsman]

Hi.

I have written my web site engine (some cmf for specific area), with which I can create web products.

How better to say in my code that it is not for open using by other people to create their new web products.

For example, some web studio looks at the demo of my CMS, orders one copy of site, and then uses this coding base as it's own.

Would putting a copirate info be formally enough?

Or do I have to indicate some license? Which one then? There are a lot of open sourse licenses but not a lot of wide known proprietary licenses.

 

[web_craftsman]

Found example:

http://stackoverflow.com/questions/6683814/is-this-good-php-commenting-practice