G.W.F.Hegel (1770-1831) : Cyfundrefn, Ysbryd a Hanes

Williams, Howard, G.W.F.Hegel (1770-1831): Cyfundrefn, Ysbryd a Hanes (University of Wales Press, 2005), pp.30-48

Where the People Are: Language and Community in the Poetry of W.S. Graham

Francis, Matthew, Language and Community in the Poetry of W.S. Graham (Cambridge: Salt Publishing, 2004) RAE2008