The reader's encyclopedia of world drama/

Eitemau Tebyg

• Theory of Modern Stage : An Introduction to Modern Theatre and Drama
  Cyhoeddwyd: (1992)
• Modern theories of drama : a selection of writings on drama and theatre, 1850-1990
  Cyhoeddwyd: (2018)
• The reader's encyclopedia of world drama,
  gan: Gassner, John, Ed
  Cyhoeddwyd: (1969)
• The world encyclopedia of contemporary theatre/Vol.1-Europe
  Cyhoeddwyd: (1994)
• The world encyclopedia of contemporary theatre/Vol.2-America
  Cyhoeddwyd: (1996)