APA (7th ed.) Citation

Easton, D., Gunnell, J. G., & Graziano, L. (1991). The Development of political science: A comparative survey. Routledge.

Chicago Style (17th ed.) Citation

Easton, David, John G. Gunnell, and Luigi Graziano. The Development of Political Science: A Comparative Survey. London ; New York: Routledge, 1991.

MLA (9th ed.) Citation

Easton, David, et al. The Development of Political Science: A Comparative Survey. Routledge, 1991.