Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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