APA (7th ed.) Citation

White, T. H., & Garnett, D. (1968). The White/Garnett letters: Edited, with a preface. Cape.

Chicago Style (17th ed.) Citation

White, T. H., and David Garnett. The White/Garnett Letters: Edited, with a Preface. London: Cape, 1968.

MLA (9th ed.) Citation

White, T. H., and David Garnett. The White/Garnett Letters: Edited, with a Preface. Cape, 1968.