APA (7th ed.) Citation

Jones, S., Dodson, C., & Davies, I. R. (1981). Poblogaeth I. Gomer.

Chicago Style (17th ed.) Citation

Jones, Siân, Carl Dodson, and I. Rh Davies. Poblogaeth I. [Llandysul]: Gomer, 1981.

MLA (9th ed.) Citation

Jones, Siân, et al. Poblogaeth I. Gomer, 1981.