Blair, Kevin (24. juli 2011). «The Forever 27 Club – Music's Growing List of Stars Who Died at 27 Years Old». StarPulse. Arkivert frå originalen 1. april 2016. Henta 26. august 2018. «Robert Johnson, Brian Jones, Jimi Hendrix, Janis Joplin, Jim Morrison, Ron "Pigpen" McKernan, Kurt Cobain, Amy Winehouse, Pete de Freitas, Kristen Pfaff, Jean-Michel Basquiat, Jacob Miller, Dave Alexander, Pete Ham, Gary Thain, Alan "Blind Owl" Wilson, and Rudy Lewis»
Blair, Kevin (24. juli 2011). «The Forever 27 Club – Music's Growing List of Stars Who Died at 27 Years Old». StarPulse. Arkivert frå originalen 1. april 2016. Henta 26. august 2018. «Robert Johnson, Brian Jones, Jimi Hendrix, Janis Joplin, Jim Morrison, Ron "Pigpen" McKernan, Kurt Cobain, Amy Winehouse, Pete de Freitas, Kristen Pfaff, Jean-Michel Basquiat, Jacob Miller, Dave Alexander, Pete Ham, Gary Thain, Alan "Blind Owl" Wilson, and Rudy Lewis»