Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Na Icons of Rock: An Encyclopedia of the Legends Who Changed Music Forever, Scott Schinder na Andy Schwartz kọwara mgbanwe egwu ndị Beatles:  Ajụjụ: Ònye kọwara otú egwú ndị Beatles si malite?
Scott Schinder na Andy Schwartz