From Tolkien Gateway
- Not to be confused with Thû.
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", p. 394
- David Salo (2004), A Gateway to Sindarin, p. 290
- Didier Willis, Hiswelókë's Sindarin Dictionary at Jrrvf.com (accessed 9 December 2011)
- Helge Fauskanger, "Parviphith Edhellen: Sindarin Wordlist" at Ardalambion (accessed 9 December 2011)