APA (7th ed.) Citation

Evans, H. M., & Thomas, W. O. (1969). Welsh-English, English-Welsh dictionary ([New ed.). Saphrograph Corp..

Chicago Style (17th ed.) Citation

Evans, H. Meurig, and W. O. Thomas. Welsh-English, English-Welsh Dictionary. [New ed. New York]: Saphrograph Corp., 1969.

MLA (9th ed.) Citation

Evans, H. Meurig, and W. O. Thomas. Welsh-English, English-Welsh Dictionary. [New ed. Saphrograph Corp., 1969.