Cita APA (7th ed.)

Perkins, F., & Cohen, A. (2011). The Roosevelt I knew. New York: Penguin Books.

Cita Chicago (17th ed.)

Perkins, Frances, i Adam Cohen. The Roosevelt I Knew. New York: Penguin Books, 2011.

Cita MLA (8th ed.)

Perkins, Frances, i Adam Cohen. The Roosevelt I Knew. New York: Penguin Books, 2011.