APA
Barraclough G., . (1974). An introduction to contemporary history. Markham ; Ontario: Penguin Books.
Chicago
Barraclough Geoffrey, . 1974. An introduction to contemporary history. Markham ; Ontario: Penguin Books.
Harvard
Barraclough G., . (1974). An introduction to contemporary history. Markham ; Ontario: Penguin Books.
MLA
Barraclough Geoffrey, . An introduction to contemporary history. Markham ; Ontario: Penguin Books. 1974.
