Gaya APA

Ricardo, D, [. (1971). On the principles of political economy, and taxation, ed.with an introd.by R.M.Hartwell. Tjet.pertama 1817. . [Harmondsworth]: Penguin.

Gaya MLA

Ricardo, David., [1772-1823].. "On the principles of political economy, and taxation, ed.with an introd.by R.M.Hartwell. Tjet.pertama 1817. ". [Harmondsworth]: Penguin, 1971. Buku.