APA (7th ed.) Citation

Williamson, A. (1982). Gilbert and Sullivan opera: An assessment (Rev.ed.). Boyars.

Chicago Style (17th ed.) Citation

Williamson, Audrey. Gilbert and Sullivan Opera: An Assessment. Rev.ed. London: Boyars, 1982.

MLA (9th ed.) Citation

Williamson, Audrey. Gilbert and Sullivan Opera: An Assessment. Rev.ed. Boyars, 1982.