a b "Discography Metallica" (in Norwegian). Norwegian charts . http://norwegiancharts.com/search.asp?search=Metallica&cat=a . Retrieved 2 August 2011 .   ^ a b "Metallica Top Albums/CDs positions" . RPM . http://www.collectionscanada.gc.ca/rpm/028020-110.01-e.php?PHPSESSID=v2a76h62to0aart05gg0u3agj2&q1=Metallica&x=20&y=5 . Retrieved 2 August 2011 .   ^ a b "Chartverfolgung Metallica Longplay" (in German). Musicline . http://www.musicline.de/de/chartverfolgung_summary/artist/METALLICA/?type=longplay . Retrieved 2 August 2011