APA (7th ed.) Citation

Williamson, A. (1962). Wagner opera / Audrey Williamson. John Calder.

Chicago Style (17th ed.) Citation

Williamson, Audrey. Wagner Opera / Audrey Williamson. London: John Calder, 1962.

MLA (9th ed.) Citation

Williamson, Audrey. Wagner Opera / Audrey Williamson. John Calder, 1962.

Warning: These citations may not always be 100% accurate.