Cita APA (7a ed.)

Marx, G. (1967). The groucho letters: Letters from and to groucho marx. Ms. Rowan.

Cita Chicago Style (17a ed.)

Marx, Groucho. The Groucho Letters: Letters from and to Groucho Marx. New York: Ms. Rowan, 1967.

Cita MLA (9a ed.)

Marx, Groucho. The Groucho Letters: Letters from and to Groucho Marx. Ms. Rowan, 1967.