APA (7th ed.) Citation

WATT, D. C. (1969). Contemporary history in Europe. George Allen and Unwin.

Chicago Style (17th ed.) Citation

WATT, Donald Cameron. Contemporary History in Europe. London: George Allen and Unwin, 1969.

MLA (9th ed.) Citation

WATT, Donald Cameron. Contemporary History in Europe. George Allen and Unwin, 1969.