APA (7th ed.) Citation

(2006). The eastern enlargement of the European Union / John O'Brennan.

Chicago Style (17th ed.) Citation

The Eastern Enlargement of the European Union / John O'Brennan. 2006.

MLA (9th ed.) Citation

The Eastern Enlargement of the European Union / John O'Brennan. 2006.

Warning: These citations may not always be 100% accurate.