APA (7th ed.) Citation

Sage Publications, Farrell, M., Fella, S., & Newman, M. (2002). European integration in the 21st century: Unity in diversity? SAGE.

Chicago Style (17th ed.) Citation

Sage Publications, Mary Farrell, Stefano Fella, and Michael Newman. European Integration in the 21st Century: Unity in Diversity? London: SAGE, 2002.

MLA (9th ed.) Citation

Sage Publications, et al. European Integration in the 21st Century: Unity in Diversity? SAGE, 2002.