Language selector in header

Hi, here is my site what I want to do is to have a wpml language selector into the header of my catch everest free theme. Not it's in footer widget area WPML section dashboard says that we can put <?php do_action('icl_language_selector'); ?> code into the php file (probably in header.php) but I did not understand on which line exactly. Is it a good way to do that? Also is it possible to add widget area in header and then from appearance--> widgets enable the language selector? Which is the best way to do this?