APA (7th ed.) Citation

Kaplan, J., & Kaplan, J. (1967). Mr. Clemens and Mark Twain: A biography. Cape.

Chicago Style (17th ed.) Citation

Kaplan, Justin, and Justin Kaplan. Mr. Clemens and Mark Twain: A Biography. London: Cape, 1967.

MLA (9th ed.) Citation

Kaplan, Justin, and Justin Kaplan. Mr. Clemens and Mark Twain: A Biography. Cape, 1967.

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