APA (7th ed.) Citation
Ball, M. J., & Müller, N. (1992). Mutation in Welsh. Routledge.
Chicago Style (17th ed.) Citation
Ball, Martin J., and Nicole Müller. Mutation in Welsh. London ; New York: Routledge, 1992.
MLA (9th ed.) Citation
Ball, Martin J., and Nicole Müller. Mutation in Welsh. Routledge, 1992.
Warning: These citations may not always be 100% accurate.