APA استشهاد

Spencer, F. (1967). History of the World in the Twentieth Century. Pan Books.

استشهاد بنمط شيكاغو

Spencer, Frank. History of the World in the Twentieth Century. London: Pan Books, 1967.

MLA استشهاد

Spencer, Frank. History of the World in the Twentieth Century. Pan Books, 1967.