APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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