APA aipamena

Clarke, W. M. (1967). The city in the world economy. London: Penguin.

Chicago Style aipamena

Clarke, William M. The City in the World Economy. London: Penguin, 1967.

MLA aipamena

Clarke, William M. The City in the World Economy. London: Penguin, 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.