APA (7th ed.) Citation

Herrnson, P. S., Deering, C. J., & Wilcox, C. (2013). Interest groups unleashed. CQ Press.

Chicago Style (17th ed.) Citation

Herrnson, Paul S., Christopher J. Deering, and Clyde Wilcox. Interest Groups Unleashed. Thousand Oaks, California: CQ Press, 2013.

MLA (9th ed.) Citation

Herrnson, Paul S., et al. Interest Groups Unleashed. CQ Press, 2013.