Æthelhelm & PASE; S 356 & Sawyer; Yorke 2001, p. 31. "Æthelhelm 4 (Male)". Prosopography of Anglo-Saxon England (PASE). Retrieved 31 December 2016. "S 356". The Electronic Sawyer: Online Catalogue of Anglo-Saxon Charters. Retrieved 18 December 2017. Yorke, Barbara (2001). "Edward as Ætheling". In Higham, Nick; Hill, David (eds.). Edward the Elder 899–924. Abingdon, UK: Routledge. pp. 25–39. ISBN978-0-4152-1497-1.
Æthelhelm & PASE; S 356 & Sawyer; Yorke 2001, p. 31. "Æthelhelm 4 (Male)". Prosopography of Anglo-Saxon England (PASE). Retrieved 31 December 2016. "S 356". The Electronic Sawyer: Online Catalogue of Anglo-Saxon Charters. Retrieved 18 December 2017. Yorke, Barbara (2001). "Edward as Ætheling". In Higham, Nick; Hill, David (eds.). Edward the Elder 899–924. Abingdon, UK: Routledge. pp. 25–39. ISBN978-0-4152-1497-1.