Notable playwrights vol. I /

Eitemau Tebyg

• Notable playwrights vol. II /
  Cyhoeddwyd: (2005)
• Notable playwrights vol. III /
  Cyhoeddwyd: (2005)
• The theatre guide /
  gan: Griffiths, Trevor R.
  Cyhoeddwyd: (2003)
• Who's who in twentieth century world poetry
  Cyhoeddwyd: (2000)
• Everyman's dictionary of literary biography, English & American,
  gan: Browning, D. C.
  Cyhoeddwyd: (1958)