ACF Page Object

<?php

$post_object = get_field('post_object');

if( $post_object ): 

	// override $post
	$post = $post_object;
	setup_postdata( $post ); 

	?>
    <div>
    	<h3><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h3>
    	<span>Post Object Custom Field: <?php the_field('field_name'); ?></span>
    </div>
    <?php wp_reset_postdata(); // IMPORTANT - reset the $post object so the rest of the page works correctly ?>
<?php endif; ?>