Fotograf:
Jorunn
Licens:
CC-PD-Mark
PD Old
Källa
http://commons.wikimedia.org/wiki/File:Haakon%20jarls%20saga%20-%20Klypp%20drep%20Sigurd%20Sleve%20-%20C.%20Krohg.jpg
Book: Snorre Sturluson: Heimskringla, J.M. Stenersen & Co, 1899.