APA aipamena

Freeman, C. (1978). World futures: The great bebate. England: Martin Roberson.

Chicago Style aipamena

Freeman, Chrisopher. World Futures: The Great Bebate. England: Martin Roberson, 1978.

MLA aipamena

Freeman, Chrisopher. World Futures: The Great Bebate. England: Martin Roberson, 1978.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.