Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Easton, David, Luigi Graziano, i John G. Gunnel. The Development of Political Science: A Comparative Survey. London: Routledge, 1991.

Cita MLA (9th ed.)

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