APA aipamena

Hawtrey, R. G. (1926). The economic problem. London: Longmans.

Chicago Style aipamena

Hawtrey, R. G. The Economic Problem. London: Longmans, 1926.

MLA aipamena

Hawtrey, R. G. The Economic Problem. London: Longmans, 1926.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.