The Penguin dictionary of quotations/

Eitemau Tebyg

• A new introduction to modal logic/
  gan: Hughes, G.E
  Cyhoeddwyd: (1998)
• The Merriam-Webster Dictionary of Quotations /
  gan: Merriam-Webster, Inc
  Cyhoeddwyd: (2004)
• The Oxford dictionary of quotations/
  Cyhoeddwyd: (1968)
• Dictionary of Quotations : Collected and Arranged and with Comments
  gan: Evans, Bergen, 1904-
  Cyhoeddwyd: (1978)
• Naturally speaking a dictionary of quotations on biology,
  Cyhoeddwyd: (2001)