Cita APA (7a ed.)

O'Mara, M. P. (2015). Pivotal Tuesdays: Four Elections That Shaped the Twentieth Century. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

O'Mara, Margaret Pugh. Pivotal Tuesdays: Four Elections That Shaped the Twentieth Century. Philadelphia: University of Pennsylvania Press, 2015.

Cita MLA (8a ed.)

O'Mara, Margaret Pugh. Pivotal Tuesdays: Four Elections That Shaped the Twentieth Century. University of Pennsylvania Press, 2015.