Citazione APA

Malthus, T., & Pullen, J. (1989). Principles of Political Economy. Cambridge University Press.

Stile di citazione Chicago

Malthus, T.R, e John Pullen. Principles of Political Economy. Cambridge: Cambridge University Press, 1989.

Citazione MLA

Malthus, T.R, e John Pullen. Principles of Political Economy. Cambridge University Press, 1989.