无法使用stylesheet_directory检索图像

I have three images that I would like to be retrieved on a Wordpress theme I am working on. Yet, none of the images are actually being retrieved. Here is my code as of now. I tried get_stylesheet_directory_uri() as well (which didn't help).

 <div class="col-md-4"> <img class = "img-responsive center-block" src ="<?php bloginfo('stylesheet_directory'); ?>/Assets/imgs/BlogReferral" alt = "Design"> 
 </div><!-- End Col --> <div class = "col-md-4"> <img class = "img-responsive center-block" src ="<?php bloginfo('stylesheet_directory'); ?>/Assets/imgs/InstagramReferral" alt = "Code">
 </div><!-- End Col -->
   <div class = "col-md-4">
          <img class = "img-responsive center-block" src ="<?php bloginfo('stylesheet_directory'); ?>/Assets/imgs/ContactReferral" alt = "Design">
 </div><!-- End Col -->         

Use function : get_template_directory_uri() function.
Image path will be : YOUR_THEME_FOLDER/Assets/imgs/IMAGE_NAME

 <div class="col-md-4"> <img class = "img-responsive center-block" src ="<?php echo get_template_directory_uri() ?>/Assets/imgs/BlogReferral" alt = "Design"> 
         </div><!-- End Col --> <div class = "col-md-4"> <img class = "img-responsive center-block" src ="<?php echo get_template_directory_uri(); ?>/Assets/imgs/InstagramReferral" alt = "Code">
         </div><!-- End Col -->
           <div class = "col-md-4">
                  <img class = "img-responsive center-block" src ="<?php echo get_template_directory_uri(); ?>/Assets/imgs/ContactReferral" alt = "Design">
         </div><!-- End Col -->

If you use Child Theme. then you need to use function get_stylesheet_directory_uri()

image path will be : YOUR_CHILD_THEME/Assets/imgs/IMAGE_NAME

<div class="col-md-4"> <img class = "img-responsive center-block" src ="<?php echo get_stylesheet_directory_uri(); ?>/Assets/imgs/BlogReferral" alt = "Design"> 
         </div><!-- End Col --> <div class = "col-md-4"> <img class = "img-responsive center-block" src ="<?php echo get_stylesheet_directory_uri(); ?>/Assets/imgs/InstagramReferral" alt = "Code">
         </div><!-- End Col -->
           <div class = "col-md-4">
                  <img class = "img-responsive center-block" src ="<?php echo get_stylesheet_directory_uri(); ?>/Assets/imgs/ContactReferral" alt = "Design">
         </div><!-- End Col -->