APA aipamena

Polak, J. J. (1954). An international economic system. London: George Allen & Unwin, Ltd.

Chicago Style aipamena

Polak, J. J. An International Economic System. London: George Allen & Unwin, Ltd, 1954.

MLA aipamena

Polak, J. J. An International Economic System. London: George Allen & Unwin, Ltd, 1954.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.