Cita APA (7th ed.)

Alt, J. E., & Shepsle, K. A. (1990). Perspectives on positive political economy. Cambridge University Press.

Cita Chicago (17th ed.)

Alt, James E., i Kenneth A. Shepsle. Perspectives on Positive Political Economy. Cambridge, [England]: Cambridge University Press, 1990.

Cita MLA (9th ed.)

Alt, James E., i Kenneth A. Shepsle. Perspectives on Positive Political Economy. Cambridge University Press, 1990.