Kippen, Cameron. "The History of Boots". Department of Podiatry. Perth, Western Australia: Curtin University. Arkiveret fra originalen 2007-08-12. Hentet 2013-09-21.
Kippen, Cameron. "The History of Boots". Department of Podiatry. Perth, Western Australia: Curtin University. Arkiveret fra originalen 2007-08-12. Hentet 2013-09-21.