Coba jelasin Earldormen dan Earl Mercia dari Earl dari Mercia dalam bahasa melayu dong

Stephen Baxter, The Earls of Mercia: Lordship and Power in Late Anglo-Saxon England (2007)

David Crouch, The Normans (2002)

Emma Mason, The House of Godwine (2004)

Earldom di England sebelum 1066