diff --git a/assets/templates/credits.phtml b/assets/templates/credits.phtml
index 97e72d2..db5a85d 100644
--- a/assets/templates/credits.phtml
+++ b/assets/templates/credits.phtml
@@ -9,6 +9,13 @@
                 <a href="https://gobyexample.com/">Go By Example</a> and by <a href="https://elixirschool.com/">Elixir School</a>. Both sites offer excellent, quality documentation in Go and Elixir and I want PHP Apprentice to provide the same
                 experience for the PHP programming language.
             </p>
+            <p>
+                Source Links:
+                <ul>
+                    <li><a href="https://secure.php.net/" target="_blank">php.net</a></li>
+                    <li><a href="https://www.phptherightway.com/" target="_blank">PHP The Right Way</a></li>
+                </ul>
+            </p>
         </div>
         <div>
             <?php partial('table_of_contents') ?>
diff --git a/docs/credits.html b/docs/credits.html
index ed78d4f..6b7c0c1 100644
--- a/docs/credits.html
+++ b/docs/credits.html
@@ -23,6 +23,13 @@
                 <a href="https://gobyexample.com/">Go By Example</a> and by <a href="https://elixirschool.com/">Elixir School</a>. Both sites offer excellent, quality documentation in Go and Elixir and I want PHP Apprentice to provide the same
                 experience for the PHP programming language.
             </p>
+            <p>
+                Source Links:
+                <ul>
+                    <li><a href="https://secure.php.net/" target="_blank">php.net</a></li>
+                    <li><a href="https://www.phptherightway.com/" target="_blank">PHP The Right Way</a></li>
+                </ul>
+            </p>
         </div>
         <div>
             <div class="table-of-contents">