| {{Certificação|OuroPlatina|2}} - [[RIAA]] <ref>{{cite web|url=http://www.riaa.com/goldandplatinumdata.php?resultpage=1&table=SEARCH_RESULTS&action=&title=piece%20of%20mind&artist=iron%20maiden&format=&debutLP=&category=&sex=&releaseDate=&requestNo=&type=&level=&label=&company=&certificationDate=&awardDescription=&catalogNo=&aSex=&rec_id=&charField=&gold=&platinum=&multiPlat=&level2=&certDate=&album=&id=&after=&before=&startMonth=1&endMonth=1&startYear=1958&endYear=2009&sort=Artist&perPage=25|title=RIAA Gold & Platinum database-''Piece of Mind''|accessdate=23 de fevereiro de 2009}}</ref>
