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Jackson, Kenneth. Studies in the Early British Church : The Sources for the Life of St Kentigern. edited by Chadwick, Nora K., 273-357. Cambridge: Cambridge University Press, 1958.
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Gwaith Llywelyn Brydydd Hoddnant, Dafydd ap Gwilym, Hillyn ac Eraill edited by Parry Owen, Ann gyda Foster Evans, Dylan. Aberystwyth: Canolfan Uwchefrydiau Cymreig a Cheltaidd, 1996. \| Coleg Cymraeg Cenedlaethol https://adnoddau.s3.eu-west-2.amazonaws.com/Beirdd/05+Gwaith+Llywelyn+Brydydd+Hoddnant.pdf [Agored/Open]
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Gwaith Llywelyn Goch ap Meurig Hen edited by Johnston, Dafydd. Aberystwyth: Canolfan Uwchefrydiau Cymreig a Cheltaidd Prifysgol Cymru, 1998. \| Coleg Cymraeg Cenedlaethol https://adnoddau.s3.eu-west-2.amazonaws.com/Beirdd/10+Gwaith+Llywelyn+Goch+ap+Meurig+Hen.pdf [Agored/Open]
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