Morris, S., Knight, D., Tovey-Walsh, B., Davies, E., & Prosser, H. (2022). The Geirfan wordlist: A vocabulary list for adult learners of Welsh. The Geirfan wordlist: A vocabulary list for adult learners of Welsh. doi:10.17035/d.2022.0234583226

Morris, Steve, Dawn Knight, Bethan Tovey-Walsh, Emyr Davies, and Helen Prosser. "The Geirfan Wordlist: A Vocabulary List for Adult Learners of Welsh." The Geirfan Wordlist: A Vocabulary List for Adult Learners of Welsh 2022.

Morris, Steve, et al. "The Geirfan Wordlist: A Vocabulary List for Adult Learners of Welsh." The Geirfan Wordlist: A Vocabulary List for Adult Learners of Welsh 2022.