diff --git a/PZEM004T-Energy-Monitor.md b/PZEM004T-Energy-Monitor.md
index b9293fa3..9c75a607 100644
--- a/PZEM004T-Energy-Monitor.md
+++ b/PZEM004T-Energy-Monitor.md
@@ -24,6 +24,7 @@ Connect the serial interface of the Sonoff Basic with the serial interface of th
 - Gnd Grey
 
 <img src="https://github.com/arendst/arendst.github.io/blob/master/media/pzem/pzem-basic.png" height="400" />
+_(Image taken from https://www.instructables.com/id/Use-Homie-Firmware-to-Drive-Sonoff-Switch-Module-E/ Thanks @amayii0)_
 
 
 As the PZEM004T is functioning better on 5V, it can be obtained from the Voltage regulator as shown in this image.