I am theming an admin page & I require to load/render admin forms in page.tpl.php file.<br> The final output should be somehow like the attached screenshot. Scroll below to see screenshot & code written in page.tpl.php. 

    <h1 class="page-title">Admin Page</h1>
    <div class="content-left">
      <!--load list of all contents("/admin/content") -->
      <?php print drupal_render(drupal_get_form('node_admin_content')); ?>
    </div>
    <div class="content-right">
      <!-- add new content form here "/node/add/page") -->
      <?php print drupal_render(drupal_get_form('page_node_form')); ?>
    </div>


![enter image description here][1] 


  [1]: https://i.sstatic.net/vGFPx.png

I was searching for this solution & I came across this "print drupal_render()". Please suggest best solution for this. I have render same kind of pages in other tpl.php files.