Cita APA (7a ed.)

Kanfer, S. (2000). Groucho: The life and times of Julius Henry Marx (1st publ. in Great Britain by Allen Lane The Pengin Press.). Allen Lane/Penguin Press.

Cita Chicago Style (17a ed.)

Kanfer, Stefan. Groucho: The Life and Times of Julius Henry Marx. 1st publ. in Great Britain by Allen Lane The Pengin Press. London: Allen Lane/Penguin Press, 2000.

Cita MLA (9a ed.)

Kanfer, Stefan. Groucho: The Life and Times of Julius Henry Marx. 1st publ. in Great Britain by Allen Lane The Pengin Press. Allen Lane/Penguin Press, 2000.