diff --git a/plugins/hdf.lua b/plugins/hdf.lua
index 3d5a2fc..57b6b58 100644
--- a/plugins/hdf.lua
+++ b/plugins/hdf.lua
@@ -2,14 +2,19 @@ function run(msg, matches)
 	randomValue = math.random(5)
 if randomValue == 1 then
 	send_photo(get_receiver(msg), "pictures/hdf/hdf1.jpg", ok_cb, false)
+	-- Source https://www.facebook.com/391509267542910/photos/a.391509814209522.110655.391509267542910/391509824209521/?type=1&theater
 elseif randomValue == 2 then
 	send_photo(get_receiver(msg), "pictures/hdf/hdf2.jpg", ok_cb, false)
+	-- Source http://echtlustig.com/312/einfach-mal-die-kresse-halten
 elseif randomValue == 3 then
 	send_photo(get_receiver(msg), "pictures/hdf/hdf3.jpg", ok_cb, false)
+	-- Source http://blog.todamax.net/2012/lieber-unbekannter-spon-kommentator/
 elseif randomValue == 4 then
 	send_photo(get_receiver(msg), "pictures/hdf/hdf4.jpg", ok_cb, false)
+	-- Source http://www.ariva.de/forum/Inside-Gigaset-AG-ehem-ARQUES-AG-424727?page=94#jumppos2373
 elseif randomValue == 5 then
 	send_photo(get_receiver(msg), "pictures/hdf/hdf5.jpg", ok_cb, false)
+	-- Source http://www.lachschon.de/item/114904-Einfachmal/
 end
 end