CSS Nesting Problem - Reading container information

This problem comes up from time to time when I work with CSS, here is the issue I face.

My current code is:

<div class="entry">
   <div>
     <blockquote><p>quoted text</p></blockquote>
   </div>
 </div>
 

In my css, I have:

.entry p {margin: 10px}
 blockquote {stuff}
 blockquote p {margin: 0px}
 

I would think the paragraph inside the blockquote would read from 'blockquote p', but instead it takes the margin: 10px from '.entry p'.

Why does it read from 'entry p' instead of 'blockquote p'?

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