APA (7th ed.) Citation

Europa Publications & Twitchett, K. J. (1980). European co-operation today. Europa Publications Limited.

Chicago Style (17th ed.) Citation

Europa Publications and Kenneth Joseph Twitchett. European Co-operation Today. London: Europa Publications Limited, 1980.

MLA (9th ed.) Citation

Europa Publications and Kenneth Joseph Twitchett. European Co-operation Today. Europa Publications Limited, 1980.