query.php

$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
$the_query = new WP_Query( 'post_type=Na-midia&paged='.$paged.'&showposts=6&posts_per_page=6'  );

if ( $the_query->have_posts() ) : 
while ( $the_query->have_posts() ) : $the_query->the_post();

//AQUI O CONTEUDO

endwhile;

previous_posts_link('Página anterior', $the_query->max_num_pages)
next_posts_link('Próxima página', $the_query->max_num_pages)

wp_reset_postdata();

else :
_e( 'Nenhuma postagem cadastrada.' );
endif;