Cita APA (7a ed.)

Haffner, S., & Pretzel, O. (2011). Defying Hitler: A memoir. Phoenix.

Cita Chicago Style (17a ed.)

Haffner, Sebastian, y Oliver Pretzel. Defying Hitler: A Memoir. London: Phoenix, 2011.

Cita MLA (9a ed.)

Haffner, Sebastian, y Oliver Pretzel. Defying Hitler: A Memoir. Phoenix, 2011.