APA
Bullock A., . (1976). Hstory of the th 20th Century. London: In Association With.
Chicago
Bullock Alan, . 1976. Hstory of the th 20th Century. London: In Association With.
Harvard
Bullock A., . (1976). Hstory of the th 20th Century. London: In Association With.
MLA
Bullock Alan, . Hstory of the th 20th Century. London: In Association With. 1976.
