Welsh National Opera and Drama Company (Cardiff). (1976). Thirtieth anniversary.
Chicago-Zitierstil (17. Ausg.)Welsh National Opera and Drama Company (Cardiff). Thirtieth Anniversary. Cardiff, 1976.
MLA-Zitierstil (9. Ausg.)Welsh National Opera and Drama Company (Cardiff). Thirtieth Anniversary. 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.