rikardo85 on "Display featured image from a custom post type"

No worries, I found a solution:

<?php
$loop = new WP_Query( array( 'post_type' => array('POST-TYPE_NAME_HERE')&'post_status=publish'));
if ( $loop->have_posts() ) : $loop->the_post(); ?>
 <div><?php echo the_post_thumbnail(); ?></div>
<?php endif; ?>