APA (7th ed.) Citation

Buckle, R. (1978). U and non-U revisited. Debrett's Peerage.

Chicago Style (17th ed.) Citation

Buckle, Richard. U and Non-U Revisited. London: Debrett's Peerage, 1978.

MLA (9th ed.) Citation

Buckle, Richard. U and Non-U Revisited. Debrett's Peerage, 1978.

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