APA aipamena

Calder, R. (1956). world set free. Collins.

Chicago Style aipamena

Calder, Ritchie. World Set Free. London: Collins, 1956.

MLA aipamena

Calder, Ritchie. World Set Free. Collins, 1956.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.