[Jellby]

This is my standard poetry styling:

div.poetry {
  margin: 1em 0 1em 2em;
}
div.stanza {
  margin: 0.5em 0;
}
div.poetry div.line {
  margin: 0;
  padding-left: 5em;
  text-indent: -5em;
  text-align: left;
}
div.poetry div.indented {
  margin-left: 2em;
}

<div class="poetry">
  <div class="stanza">
    <div class="line">&lsquo;&ldquo;You are old, Father William,&rdquo; the young man said,</div>
    <div class="line indented">&ldquo;And your hair has become very white;</div>
    <div class="line">And yet you incessantly stand on your head&mdash;</div>
    <div class="line indented">Do you think, at your age, it is right?&rdquo;</div>
  </div>

  <div class="stanza">
  ...
  </div>
</div>