APA সাইটেশন

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

শিকাগো স্টাইলে সাইটেশন

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

এমএলএ সাইটেশন

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