Fix Error In Test Rich Snippet Of Google

I has error in test rich snippet page of google is:
Error: Missing required field "entry-title".
Error: Missing required field "updated".
Error: Missing required hCard "author".
You can guide me "How to fix them?"
Thanks You

I have the same problem in the Google Webmaster Tools is displayed to me.

Error: Missing required field "entry-title".
Error: Missing required field "updated".
Error: Missing required hCard "author".

Here is the solution
http://www.ilmigo.com/fix-hfeed-warning-field-set-hatomentry.html

However, I would have to know

in which file I can make this change because the single.php is not.

These customizations can be made in the file theloop.php.