Fifty poems.
Translated, with introductory essays, by H. Idris Bell and David Bell.

APA Citation

Dafydd ap Gwilym, a. 14th century., Bell, H. Idris (Harold Idris)., Bell, D. (1942). Fifty poems. London: The Honourable society of Cymmrodorion.

MLA Citation

Dafydd ap Gwilym, active 14th century, H. Idris (Harold Idris) Bell, and David Bell. Fifty Poems. London: The Honourable society of Cymmrodorion, 1942.

Warning: These citations may not always be complete (especially for serials).