APA aipamena

Walpole, H. (1997). Secret city. Sutton Publishing Ltd.

Chicago Style aipamena

Walpole, Hugh. Secret City. Gloucestershire: Sutton Publishing Ltd, 1997.

MLA aipamena

Walpole, Hugh. Secret City. Sutton Publishing Ltd, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.