एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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