APA aipamena

Woodruff, W. (1975). America's impact on the world. London: Macmillan.

Chicago Style aipamena

Woodruff, William. America's Impact On the World. London: Macmillan, 1975.

MLA aipamena

Woodruff, William. America's Impact On the World. London: Macmillan, 1975.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.