APA-Zitierstil (7. Ausg.)

Ryan, D. (2014). The United States and Europe in the twentieth century. Routledge, Taylor & Francis Group.

Chicago-Zitierstil (17. Ausg.)

Ryan, David. The United States and Europe in the Twentieth Century. London: Routledge, Taylor & Francis Group, 2014.

MLA-Zitierstil (9. Ausg.)

Ryan, David. The United States and Europe in the Twentieth Century. Routledge, Taylor & Francis Group, 2014.