APA استشهاد

Michael Howard & Roger Louis. (1998). The oxford history of the twentieth century. Oxford University Press.

استشهاد بنمط شيكاغو

Michael Howard و Roger Louis. The Oxford History of the Twentieth Century. Oxford: Oxford University Press, 1998.

MLA استشهاد

Michael Howard و Roger Louis. The Oxford History of the Twentieth Century. Oxford University Press, 1998.