Have you tried using the help documents? Here’s a great post with PHP examples: http://www.advancedcustomfields.com/resources/relationship/
<?php
$posts = get_field('relationship_field_name');
if( $posts ): ?>
<ul>
<?php foreach( $posts as $post): // variable must be called $post (IMPORTANT) ?>
<?php setup_postdata($post); ?>
<li>
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
<span>Custom field from $post: <?php the_field('author'); ?></span>
</li>
<?php endforeach; ?>
</ul>
<?php wp_reset_postdata(); // IMPORTANT - reset the $post object so the rest of the page works correctly ?>
<?php endif; ?>
Or are you trying to do this without any custom coding?
