follow-up-II/RFID-reader.md

@@ -10,7 +10,9 @@ Use `docker-compose.rfid.yml` to build and run a Docker container. The docker co
 
 The used RFID reader can be connected to a Raspberry Pi like this:
 
-![RfidReader](uploads/e41d1c8dc44cc91cd48c465f231dd695/RfidReader.png)
+| ![RfidReader](uploads/e41d1c8dc44cc91cd48c465f231dd695/RfidReader.png) |
+|:--:| 
+| image from the AZ-Delivery [Quick-Start-Guide](https://www.az-delivery.de/en/products/rfid-kit-kostenfreies-e-book) |
 
 | Module pin | Raspberry Pi pin |
 |-----|-----|