wp query get custom post type

1  <?php    
2  	   $args = array(  
3      'post_type' => 'custom_type',
4      'post_status' => 'publish',
5      'posts_per_page' => 8, 
6      'orderby' => 'title', 
7      'order' => 'ASC', 
8          );
9
10  $loop = new WP_Query( $args ); 
11
12  while ( $loop->have_posts() ) : $loop->the_post(); 
13      print the_title(); 
14      the_excerpt(); 
15  endwhile;
16
17  wp_reset_postdata(); 
18  ?>

1//WordPress: Query a custom post type
2//For example, query all Case Study post types
3
4<?php query_posts('post_type=case_studies'); ?>