WP_Query and prev/next links

I’m displaying the content of a few pages (not posts!) on a page using WP_Query; I have limited the amount of items to display and now I’m wondering how to add “next” and “prev” links to it. What I have isn’t working:

$query = new WP_Query(array(
	'post_type' => 'page',
	'posts_per_page' => 2,
	'paged' => get_query_var('page')
));
if($query -> have_posts()):
	while($query->have_posts()) : $query->the_post();
?>
// stuff here
	<?php next_posts_link(); ?>
	<?php previous_posts_link(); ?>
	<?php
		endwhile;
		wp_reset_postdata();
	endif;
?>

What am I doing wrong? (P. S.: I do have more than two pages)