1. William Butler Yeats -The Celtic Twilight: Faerie and Folklore (Celtic, Irish) Paperback – Illustrated, September 7, 2011
2. Foster 1997, p. 184 (https://cutt.ly/TV7ur2V)
3. Nobel Prize in Literature 1923. Citation date: 7 December 2014 (https://cutt.ly/cV7uoGf)
4. Foster 2003, p. 656. (https://cutt.ly/cV7usP4)
5. Yeats ‘Nationality and Literature’ (lecture given on 19 May 1893)