General rule is that once a meme gets its own tag (ga_rune_pose), it becomes unnecessary to tag its source. In this case, though, I'd say the background graphics, modified text aside (BTW, TheKid965, 'grats and thanks), would justify having the copyright tag included.
Kaname Madoka
Contract!
It's the same on the rest of the yellow tape.Akemi HomuraPuella Magi Madoka Magica
All the long lines say this.Sakura-
Sakura KyoukoMiki Saya-
Miki SayakaTomoe Mami