diff --git a/2.-Software-Architecture-Specification.md b/2.-Software-Architecture-Specification.md
index cda7636..e0b5139 100644
--- a/2.-Software-Architecture-Specification.md
+++ b/2.-Software-Architecture-Specification.md
@@ -266,4 +266,10 @@ The whole system layout can be used for international purposes since the user ma
 ##
 
 # 8. References <a name="R"/>
-| Reference | Source |
+
+| **Reference** | **Source** |
+| ------------- |-------------|
+| [1] | https://faq.arc42.org/questions/C-1-2/, 20.04.2022 |
+| [2] | https://github.com/DekaAthlos/TINF19C-ModellingWizard/wiki/2.-Software-Architecture-Specification, 21.04.2022 | 
+| [3] | https://www.perforce.com/blog/alm/how-write-software-requirements-specification-srs-document, 21.04.2022 |
+| [4] | https://books.google.de/books?id=7pVbAgAAQBAJ&lpg=PA1&ots=3l-6o0BDrw&dq=clean%20code%20robert%20martin&lr&hl=de&pg=PA1#v=onepage&q&f=false, 22.04.2022 |