One technique i use is to define the properties of a generic blockquote container itself, then use a complex selector to style all paragraphs within a BQ a certain way:
blockquote {margin:2em}
blockquote.write p {text-align:left; text-indent:1em; font-style:italic}
blockquote.print p {text-align:justify; text-indent:0; font-family:unicode}
<blockquote class="write">
<p>...</p>
<p>...</p>
<p>...</p>
</blockquote>
<blockquote class="print">
<p>...</p>
<p>...</p>
<p>...</p>
</blockquote>