Sims-Williams, P. Irish influence on medieval Welsh literature. Oxford University Press.
Citazione stile Chigago Style (17a edizione)Sims-Williams, Patrick. Irish Influence on Medieval Welsh Literature. Oxford University Press.
Citatione MLA (8a ed.)Sims-Williams, Patrick. Irish Influence on Medieval Welsh Literature. Oxford University Press.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.