Merriam-Webster's dictionary and thesaurus.

Manylion Llyfryddiaeth
Fformat:	Llyfr
Cyhoeddwyd:	Springfield, Mass. Merriam Webster, Inc. c2014.
Rhifyn:	Revised and updated edition.
Pynciau:	English language > Dictionaries. nglish language > Synonyms and antonyms > Dictionaries.