Hi, sohaaib.
Your site is a WordPress site, so you should be able to use GoodReviews by either issuing the shortcode or by using the do_shortcode() WordPress PHP function. I have no experience with WooCommerce, so I cannot say for certain what specific changes you might need to make to get the plugin to work there. You can test the plugin by pasting the following code on a page on your site:
[goodreviews isbn="0000000000000" height="500" width="500" border="On"]
Replace 0000000000000
with the ISBN for one your books.
If you need to use the PHP version, you should be able to do something like the following (untested):
<?php echo do_shortcode('[goodreviews isbn="0000000000000" height="500" width="500" border="On"]');?>
where 0000000000000 is the ISBN for one of your books.
Hope that helps.
James