I have found this code for rich snippets:

```
<div itemscope itemtype=”http://schema.org/Product”>
 <img itemprop=”image” src=”image-link.jpg” alt=”Product Name“/>
  <span itemprop=”name”>Product Name</span>
  <div itemprop=”aggregateRating itemscope  
   itemtype=”http://schema.org/AggregateRating”>
  <span itemprop=”ratingValue”>4.5</span>
  out of <span itemprop=”bestRating”>5</span>
 based on <span itemprop=”ratingCount”>301</span> user ratings.
</div>

```

But I don't need ased on `<span itemprop=”ratingCount”>301</span>` user ratings. Because the ratings will be only by the author and it should looks like this picture below:

[![Google Rich Snippet showing rating stars and reviewer name](https://i.stack.imgur.com/PXfyN.jpg)](https://i.stack.imgur.com/PXfyN.jpg)